The Lindsey Graham Sanctions Act: Economic Warfare Against Russia Enters a New Phase

By Matthew Parish

Monday 21 September 2026

On 18 September 2026, President Donald Trump signed into law one of the most potentially consequential pieces of economic warfare legislation adopted by the United States since Russia began her full-scale invasion of Ukraine. The Lindsey O. Graham Sanctioning Russia and Iran Act of 2026, H.R. 5334, is therefore no longer a congressional threat hanging over Moscow and the countries that trade with her. It is American law. The question has changed from whether Washington will acquire these extraordinary powers to how President Trump will use them.

The distinction is important because the legislation is not a conventional sanctions statute in which Congress has simply prohibited a list of transactions. It establishes new sanctions against Russia and those assisting her war economy, targets Russian energy and defence interests and the shadow fleet of tankers used to circumvent existing restrictions, while also providing the President with extraordinary powers to impose tariffs upon countries purchasing Russian energy or facilitating sanctions evasion. The White House described the new law succinctly as legislation that ‘authorizes and expands statutory sanctions, tariffs, and prohibitions on Russia and extends existing sanctions on Iran’. The description is short; the geopolitical implications are not.

The Act represents the culmination of the sanctions strategy advocated by the late Senator Lindsey Graham, although the legislation that ultimately became law differs substantially from his original proposal. Graham’s initial scheme became famous for contemplating tariffs of at least 500 per cent upon goods from countries continuing specified forms of trade involving Russian energy and uranium. The number was intentionally spectacular. A tariff of 500 per cent is not really a tariff in the ordinary commercial sense. It is an embargo expressed through the language of customs law.

The legislation ultimately adopted by Congress is more discriminating. Extremely high tariffs remain available against Russian goods themselves, but the principal secondary tariff mechanism aimed at third countries purchasing Russian energy is capped at 100 per cent. Even that is potentially transformative. Doubling the landed tariff cost of goods from a major trading country could alter commercial relations on a scale far exceeding traditional financial sanctions.

The central innovation is therefore not the severity of the sanctions imposed directly upon Russia. It is the attempt to turn access to the American economy into leverage over the rest of the world.

From sanctions against Russia to sanctions against Russia’s customers

Western sanctions have always faced a structural problem. Russia does not need to sell petroleum to Britain, Germany or the United States provided somebody else will buy it. After 2022, Russian energy commerce consequently changed geography rather than disappearing. China and India became particularly important purchasers, while complex networks of traders, tankers, insurers, intermediaries and financial institutions developed around the continuing movement of Russian hydrocarbons.

This did not render Western sanctions irrelevant. Russia frequently had to accept discounts, assume additional transportation costs and employ more cumbersome financial arrangements. Nevertheless the continuing existence of a large international market for Russian petroleum ensured that energy revenues continued to finance the Russian state and therefore, indirectly, her war.

The Graham Act attacks this problem from the opposite direction. Instead of asking how America can prevent Russia from selling oil, it asks what America can do to those who buy it.

The answer derives from an elementary fact about the international economy. Access to the United States remains exceptionally valuable. China may buy Russian petroleum, but she also exports enormous quantities of goods to America. India may benefit from discounted Russian crude, but she has extensive commercial relationships with American businesses and consumers. Secondary sanctions exploit the disparity between the value of a particular transaction with Russia and the much larger value of access to American markets.

The legislation therefore establishes tariff machinery directed at the largest purchasers of Russian crude oil or natural gas and countries significantly facilitating Russian energy sanctions evasion. The final legislation deliberately does not contain a fixed statutory blacklist. An attempt in the House Rules Committee to identify China, India, Türkiye, Azerbaijan, Hungary, Slovakia, the United Arab Emirates, Singapore, Kazakhstan and Kyrgyzstan expressly as initially eligible countries was not adopted. The law instead establishes categories and leaves their administration substantially to the executive branch.

That is one of the most important features of the legislation. It is simultaneously a sanctions law and a negotiating instrument.

The thirty-day clock

The first significant date now lies in October. Reuters reports that the Act requires the administration within 30 days to impose tariffs of up to 100 per cent upon goods imported from the five largest importers of Russian crude oil or gas, as well as countries falling within specified categories concerning new purchases and leading facilitation of sanctions evasion. The statute nevertheless leaves important questions of calculation and implementation to the executive branch.

This means that the immediate activity may take place not at American ports but inside the Departments of the Treasury, State and Commerce and the Office of the United States Trade Representative. Officials must determine which states fall within the statutory categories, how Russian energy purchases are to be measured, which transactions constitute sanctions evasion and how the new regime interacts with America’s existing sanctions architecture.

Those technical decisions will have enormous geopolitical consequences. Calculating the ‘largest’ purchasers sounds straightforward until one asks whether purchases are measured by physical volume or value, whether refined products derived from Russian crude are relevant, how indirect purchases are treated, what period provides the appropriate measurement and how pipeline gas should be compared with seaborne oil.

There will also be difficult questions concerning circumvention. Russian petroleum has developed increasingly complicated commercial biographies. A cargo can change ownership, documentation, destination and financing arrangements during its journey. Russian crude can be refined in another country and subsequently exported as diesel, aviation fuel or another petroleum product. Determining where Russian energy begins and where an ordinary internationally traded refined product ends is partly a legal question, partly an accounting question and partly an intelligence exercise.

This is why implementation will matter at least as much as statutory language.

China

China presents the greatest test of the legislation because she combines extensive purchases of Russian energy with the economic power to retaliate against American measures. A sanctions programme directed against a smaller economy can rely upon overwhelming asymmetry. A confrontation with China cannot.

Beijing has already objected to what it characterises as American extraterritorial or ‘long-arm’ jurisdiction. Reuters reports that China has reiterated its opposition to such measures. The Chinese objection reflects a longstanding dispute about the legitimacy of secondary sanctions: Washington regards access to its own market as something upon which it may impose conditions, whereas Beijing argues that the United States is improperly attempting to regulate commercial relationships between third countries and Russia.

President Trump nevertheless now possesses a statutory instrument that can be used in negotiations with President Xi Jinping. Indeed Reuters reported that American officials had sought rapid passage of the legislation partly so that the President would possess additional leverage in his forthcoming discussions with Xi.

This suggests one plausible mode of implementation. The administration need not begin by imposing the maximum tariff. The existence of statutory authority itself creates negotiating leverage. Washington can ask Beijing to reduce Russian energy purchases, alter particular financial arrangements, cease assistance to specified Russian entities or cooperate against identified sanctions-evasion networks. Tariff rates can then form part of those negotiations.

The threat may consequently matter more than its execution.

India

India presents a subtler diplomatic problem. She has become an important purchaser of Russian petroleum while simultaneously developing increasingly significant strategic and economic relationships with the United States. New Delhi has historically insisted upon strategic autonomy and has resisted the proposition that Washington should determine from whom India purchases energy.

The legislation therefore creates a conflict between two American objectives. Washington wants to reduce the revenues available to Russia, but successive American governments have also regarded a strong relationship with India as strategically important in Asia.

An indiscriminate maximum tariff could place those objectives in tension. A negotiated implementation might instead seek measurable reductions in Russian purchases, tighter scrutiny of particular transactions or cooperation against identified evasion mechanisms.

India has already warned that further tariffs could damage bilateral relations. That response is unsurprising. From New Delhi’s perspective, Russian petroleum has been purchased because it is commercially attractive and because India rejects the idea that she must align all her foreign economic relations with Washington’s geopolitical priorities.

The effectiveness of the legislation will therefore depend upon whether the costs Washington can credibly impose exceed the benefits India receives from purchasing Russian energy.

The curious importance of a zero

One of the most interesting implementation possibilities arises from the wording of the tariff provisions themselves. Reuters has reported the view of former American trade official Ryan Majerus that the administration might satisfy aspects of the statutory timetable by initially imposing a zero-rate tariff and subsequently revising the rate.

That possibility illustrates the extraordinary flexibility built into the new system. A tariff authority ranging from zero to 100 per cent is not merely a punishment. It is a dial.

Washington could therefore calibrate pressure. A government reducing its Russian purchases might face a low rate. A government increasing them might face a higher one. A country cooperating with American enforcement efforts could receive a waiver. Another accused of deliberately constructing sanctions-evasion networks could face escalation.

Whether the administration actually adopts such a graduated system remains uncertain. But the statutory architecture permits sanctions diplomacy of this sort, and President Trump’s established preference for tariffs as negotiating instruments makes the possibility particularly relevant.

Why Trump may initially proceed cautiously

There are reasons why the maximum tariff rates may not immediately appear.

The first is inflation. Restricting Russian energy exports too abruptly could increase world petroleum prices. That creates the paradox that has haunted Western energy sanctions since 2022: reducing the quantity of Russian petroleum reaching world markets can increase the price of the petroleum Russia continues to sell.

The objective therefore cannot rationally be simply to make Russian oil disappear. It is to reduce the amount of money Moscow receives from selling it.

The second consideration is the American consumer. Tariffs are collected from importers entering goods into the United States. Their economic burden may subsequently be divided among foreign producers, American importers, businesses and consumers depending upon market conditions. A sudden 100 per cent tariff upon goods from a major trading economy could therefore disrupt supply chains and raise prices inside the United States.

Reuters has reported analysts suggesting that the proximity of the November 2026 midterm elections may encourage caution, particularly given existing sensitivity about energy prices. This is an attributed political assessment rather than a certainty about administration policy, but the economic constraint is real regardless of electoral considerations.

The third reason is diplomatic leverage. Once the maximum sanction has been imposed, part of the threat has been spent. A government negotiating under the possibility of a 100 per cent tariff has something to lose and Washington has something to withhold. If the tariff is immediately imposed at its ceiling, subsequent escalation becomes more difficult.

Hence the administration may find that the most powerful number in the legislation is not 100 per cent but the distance between zero and 100.

The shadow fleet

Less spectacular but potentially more immediately consequential are the provisions aimed at Russia’s shadow fleet.

Russia has assembled or gained access to a large network of ageing tankers, obscure ownership structures, alternative insurance arrangements and intermediary companies that permit petroleum to move outside traditional Western maritime systems. These vessels have become one of the physical foundations of Russian sanctions circumvention.

The new Act expressly strengthens the ability of the United States to target this infrastructure.

Here implementation is likely to involve the familiar machinery of American financial sanctions: identifying vessels, owners, managers, traders, financial institutions and related entities, designating them and making dealings with them legally or commercially hazardous. The Treasury Department’s Office of Foreign Assets Control is particularly important because an OFAC designation can have effects extending far beyond American companies. Banks, insurers and commodity traders elsewhere frequently avoid designated counterparties because they fear losing access to American financial institutions or themselves attracting sanctions scrutiny.

The shadow fleet nevertheless presents enforcement problems. A tanker can change her flag, registered owner, management company and name. Corporate structures can be layered through multiple jurisdictions. New intermediaries can replace designated ones. Sanctions enforcement consequently resembles an endless contest between identification and reinvention.

But reinvention costs money. Every shell company, additional intermediary, alternative insurer and ageing tanker represents friction. Sanctions need not make Russian petroleum physically impossible to transport in order to diminish its profitability.

Banks may move before governments do

This leads to another likely consequence of the legislation. Some of its effects may occur without Washington imposing a single maximum tariff.

International banks are extraordinarily sensitive to American sanctions risk. A financial institution contemplating a profitable transaction involving Russian petroleum must now consider not only existing sanctions but the possibility that its home country, counterparties or associated commercial networks might fall within an expanding American secondary-sanctions regime.

Compliance departments tend to dislike uncertainty. Where the legal boundary is unclear, major banks frequently retreat farther than the law strictly requires.

The same applies to insurers, shipping companies and commodity traders. This phenomenon, sometimes described as over-compliance, can amplify American sanctions enormously. Washington does not have to police every transaction itself if private institutions conclude that the commercial reward is insufficient to justify the regulatory risk.

The Act may therefore begin affecting Russian commerce before the administration announces its most consequential tariff decisions.

Europe and the problem of allies

The legislation also contains mechanisms intended to avoid indiscriminately penalising countries genuinely reducing their dependence upon Russian energy. Congressional descriptions of the legislation note an exemption for countries whose imports of Russian natural gas represent less than 15 per cent of Russia’s total gas exports and that are taking significant steps to reduce those imports.

This matters particularly in Central Europe, where infrastructure and geography have left some states more dependent upon Russian supplies than others.

Hungary and Slovakia pose especially awkward questions because Russian energy remains significant to their economies. The House debate demonstrated that lawmakers were acutely aware of the problem: the unsuccessful amendment proposing an explicit initial list would have included both countries.

American officials will therefore have to distinguish between dependence, deliberate expansion of Russian commerce and active facilitation of sanctions circumvention. Treating all three as identical would risk disputes with allies while potentially weakening political support for the sanctions regime.

The President’s waivers

Perhaps the most politically consequential provisions are the President’s waiver authorities.

The House Rules Committee record reveals that an amendment attempting to narrow the waiver standard so that sanctions could be waived only when doing so was ‘vital to the national security of the United States’ was rejected. Another proposed amendment sought to remove the open-ended presidential waiver authority altogether. It too failed.

Congress therefore consciously enacted legislation containing substantial executive flexibility.

This changes how the statute should be understood. The Act is not a mechanical machine that automatically places 100 per cent tariffs upon China and India. It creates powerful statutory obligations and authorities but leaves the President substantial influence over their practical severity.

Waivers may therefore become bargaining instruments. A country that agrees to reduce purchases, assist sanctions enforcement or modify particular commercial arrangements may seek relief. The possibility of receiving or losing a waiver itself becomes leverage.

That flexibility may make the law more diplomatically useful. It also means that its actual economic effect cannot be inferred merely by reading the maximum tariff figures.

Congress has nevertheless changed the legal landscape

Presidential discretion should not obscure another important development. Russia sanctions have acquired a stronger statutory foundation.

This matters because sanctions imposed exclusively through executive orders can generally be altered by subsequent executive action within the authority Congress has delegated. When Congress itself establishes sanctions in legislation, removing them can become more difficult.

The Graham Act goes further by establishing conditions relating to the eventual termination of Russia-related sanctions. Congressional descriptions of the legislation state that the President may terminate relevant measures after certifying that Russia has entered into a peace agreement accepted by the free and independent Government of Ukraine, ceased hostilities and ceased efforts to overthrow, dismantle or subvert Ukraine’s government, with termination subject to congressional review.

That provision may ultimately prove as important as the headline tariffs.

It connects sanctions relief to Ukraine’s acceptance of a peace agreement rather than simply to an arrangement negotiated between Washington and Moscow. Sanctions thereby become embedded in the architecture of any eventual settlement.

What Moscow must now calculate

For Russia, the immediate problem is uncertainty. Moscow knows the statutory maximums but does not yet know how aggressively Washington will employ them. Neither do Beijing, New Delhi, commodity traders, shipping companies or international banks.

Uncertainty itself imposes economic costs. A Chinese refinery considering a long-term Russian supply contract must now price American tariff risk into its calculations. An Indian trader must consider whether today’s commercially attractive arrangement may become politically expensive next month. A bank financing a tanker must consider whether the vessel, owner or counterparty may subsequently be designated.

Russia can undoubtedly continue constructing alternative commercial networks. She has demonstrated considerable ingenuity in doing so since 2022. But each additional layer of circumvention makes commerce more expensive. The strategic objective of sanctions is therefore not necessarily to stop Russian trade. It is to tax Russia’s capacity to trade.

The danger of overreach

There is nevertheless a limit to this strategy. American secondary sanctions are powerful because participation in the American economic system is valuable. If Washington uses access to that system as an instrument of coercion too frequently, other countries acquire stronger incentives to reduce their dependence upon it.

China has already spent years developing alternative payment mechanisms and reducing vulnerabilities to American financial pressure. Russia has done the same under necessity. India continues to emphasise strategic autonomy. Other governments watch these disputes carefully.

The United States therefore confronts a paradox. The more powerful the dollar and American market are, the more tempting it becomes to weaponise access to them. The more frequently that weapon is used, the stronger the incentive for other countries to construct alternatives.

Those alternatives cannot be created overnight. The depth of American capital markets, the role of the dollar, America’s technological sophistication and the size of her consumer economy cannot simply be replicated by political decree. Nevertheless economic coercion has long-term as well as immediate effects.

Successful implementation of the Graham Act will consequently require discrimination. Washington must impose enough credible economic pain to alter incentives without persuading large parts of the world that insulation from American economic power has become an overriding strategic necessity.

A sanctions law designed for negotiation

This may ultimately be the most important way to understand the Act. Its predecessor was popularly characterised as the ‘500 per cent sanctions bill’. That description captured its political drama but obscured its strategic logic. The final law is more sophisticated precisely because it provides gradations of pressure.

President Trump can threaten tariffs, impose them, vary them, waive them and connect them with negotiations over Russian energy purchases. Treasury can pursue vessels and financial institutions. American diplomats can demand cooperation against circumvention. Foreign governments can alter their behaviour without publicly announcing that they have capitulated to Washington.

The machinery can therefore operate continuously rather than through a single spectacular act of economic punishment. That may be particularly compatible with Trump’s transactional approach to foreign economic policy. Tariffs in his administration have frequently served not merely as permanent instruments of protectionism but as bargaining instruments. The Graham Act supplies a statutory framework through which the same technique can now be applied specifically to the economic foundations of Russia’s war.

Yet this also makes implementation less predictable. Congress has built the weapon. The executive branch decides to a substantial degree where it is pointed and how hard the trigger is pulled.

The next month

The period between now and approximately 18 October 2026 will therefore be unusually important.

The administration must begin translating legislation into administrative action. Governments and corporations will seek clarification. Treasury officials will examine transactions and sanctions-evasion networks. Trade officials will assess tariff classifications and country exposure. American diplomats will undoubtedly hear arguments from governments insisting that they deserve exemptions, waivers or favourable treatment.

China and India will be watched most closely, but focusing exclusively upon them would miss much of the legislation’s significance. The shadow fleet, intermediary trading centres, financial institutions and jurisdictions facilitating Russian energy commerce may prove equally important.

Nor should effectiveness be judged simply by counting designations or measuring tariff percentages. If countries begin quietly reducing Russian purchases, banks withdraw financing, traders demand larger discounts and shipowners require greater compensation for risk, the legislation will already be affecting Russia’s war economy.

Conversely, if waivers become routine, enforcement is hesitant and foreign governments conclude that the tariff threat is principally rhetorical, the deterrent effect will diminish.

Implementation rather than enactment is therefore the decisive stage.

Economic warfare becomes law

The Lindsey O. Graham Sanctioning Russia and Iran Act marks an important development in the economic dimension of the Ukraine war because it changes the object of American sanctions policy. Russia herself remains sanctioned, but the new strategy increasingly concentrates upon the international economic ecosystem that enables her to withstand sanctions.

The distinction is profound. A sanctions wall surrounding Russia can be circumvented if enough doors remain open elsewhere. The Graham Act attempts instead to place a price upon opening those doors.

Whether that price is five per cent, 50 per cent or 100 per cent will often be for the Trump administration to determine. Whether countries choose Russian petroleum or American market access will depend upon their own economic calculations. Whether Russia can construct alternative commercial networks quickly enough to compensate will become another stage in the extraordinary adaptation of the Russian wartime economy.

The legislation therefore does not settle the sanctions contest. It enlarges the battlefield. Modern economic warfare is fought through tanker registries, customs classifications, correspondent banking relationships, insurance contracts, refinery purchases and spreadsheets recording the origin of crude petroleum. Its weapons are obscure compared with drones and artillery, but their strategic objective is ultimately the same: to diminish an adversary’s capacity to sustain war.

Three days ago, that weapon ceased to be a proposal associated with Lindsey Graham. President Trump’s signature made it the law of the United States. What happens next will reveal whether Washington intends principally to brandish it, to negotiate with it or to use it at something approaching its full strength.