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President Trump signed a sweeping new sanctions law on September 18, 2026, giving his administration fresh authority to punish Russia’s energy trade and to keep pressure on Iran through the next decade. The Russia Iran sanctions act, formally the Lindsey O. Graham Sanctioning Russia and Iran Act of 2026, lets the president impose tariffs of up to 100% on the five largest buyers of Russian oil and natural gas, and targets the “shadow fleet” of tankers Moscow has used to dodge existing restrictions.
What the Russia Iran sanctions act actually does
The law, known in Congress as H.R. 5334, passed the Senate 86-11 in August and the House of Representatives 262-159 on September 16, before reaching the president’s desk two days later. Its core provisions authorize sanctions and steep tariffs on Russian officials, financial institutions and defense-related networks, as well as on foreign governments and companies that help Russia evade existing restrictions. The legislation also extends the Iran Sanctions Act of 1996 through 2031, locking in restrictions on Tehran for another five years beyond their prior expiration.
Named for a senator who did not live to see it signed
The bill carries the name of Senator Lindsey Graham, the South Carolina Republican who championed tougher Russia sanctions for years before his death in July 2026. Colleagues who pushed the measure through in the months that followed described it as completing work Graham had spent years building support for, and the White House signing ceremony referenced his role directly.
The shadow fleet and the new tariff threat
The centerpiece of the new authority targets Russia’s so-called shadow fleet, tankers that move Russian oil while obscuring ownership and insurance to sidestep Western price caps. Under the new law, the administration can now threaten tariffs as high as 100% against the countries that buy the most Russian oil and gas, a tool intended to squeeze the revenue Moscow uses to fund its war in Ukraine without direct military confrontation.
What comes next for Moscow and Tehran
The administration has not yet named which countries or companies will face the new tariffs, and officials say implementation will roll out over coming weeks as the Treasury and State Departments identify targets. Energy analysts are watching whether major buyers of Russian crude adjust their purchasing to avoid becoming a designated target, which could reshape global oil-trade patterns heading into 2027. For Iran, the extension of the 1996 sanctions framework removes any near-term prospect of that law lapsing, a scenario that had been debated in Washington earlier in the year.
How the shadow fleet actually evades sanctions today
The shadow fleet typically relies on ship-to-ship transfers in open water, flags of convenience registered to obscure shell companies, and insurance arranged outside Western providers who would otherwise be bound by sanctions compliance rules. Maritime trackers have documented hundreds of vessels operating this way since the initial round of price-cap sanctions took effect, moving Russian crude to buyers in Asia and elsewhere at prices well above the official cap. The new law gives US authorities more direct tools to sanction the intermediaries who arrange this insurance and financing, rather than only targeting the tankers themselves, which officials argue was a major gap in the earlier sanctions regime.
How Congress got here
The bill’s path through Congress was unusually smooth for sanctions legislation of this scope. It cleared the Senate 86-11 in August, a margin that reflected rare bipartisan appetite for tougher measures against Moscow even amid disagreement over other foreign policy questions. The House followed with a 262-159 vote on September 16, clearing the way for the president’s signature just two days later. Supporters argued the shadow-fleet provisions closed a gap that existing sanctions regimes had failed to address, since tankers that obscure ownership and insurance have let billions of dollars in Russian oil revenue continue flowing despite earlier restrictions.
How allies and adversaries are reacting
European governments, which have pursued their own sanctions against Russia’s energy sector since the war in Ukraine began, broadly welcomed the new US authority as complementary to their existing measures. Russian officials dismissed the law as further evidence of Washington’s hostility, while analysts in Moscow cautioned that the shadow fleet has proven adaptable before and may again find workarounds. Whether the new tariff threat proves more effective than earlier sanctions rounds will likely become clear only once the administration names its first targets.
Frequently Asked Questions
What is the Russia Iran sanctions act?
It is the Lindsey O. Graham Sanctioning Russia and Iran Act of 2026, a law signed by President Trump on September 18, 2026, that expands sanctions and tariff authority against Russia’s energy trade and extends existing Iran sanctions through 2031.
Who does the law target?
Russian officials, financial institutions and defense-related networks, the shadow fleet of tankers used to evade oil price caps, and any foreign government or company that helps Russia dodge existing sanctions.
How high could the new tariffs go?
The law authorizes tariffs of up to 100% on the five largest purchasers of Russian oil and natural gas, though the administration has discretion over which countries or entities are actually designated.
Why is the bill named after Lindsey Graham?
Senator Lindsey Graham championed tougher Russia sanctions for years before his death in July 2026; lawmakers named the bill for him after it passed.
Does this affect separate Iran ceasefire diplomacy?
The law runs alongside, not in place of, separate diplomatic efforts around Iran; it primarily extends an existing sanctions framework rather than introducing new ceasefire-related measures.
Related coverage on Tamara News
For more context, see our reporting on Oil prices iran war fears, Ukraine drone attack moscow refinery and Iran ceasefire diplomatic progress.
Sources
- RFE/RL — Trump Signs Russia-Iran Sanctions Bill, Putting New Pressure Tools At His Disposal. https://www.rferl.org/a/33859294.html
- CBS News — Trump signs Russia sanctions bill championed by Lindsey Graham. https://www.cbsnews.com/news/trump-signs-russia-sanctions-bill-lindsey-graham/
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