President Donald Trump signed a sanctions law on September 18, 2026, targeting Russian energy and defense sectors. The legislation empowers the White House to levy tariffs of up to 100% on the largest importers of Russian oil and gas.
The 100% Tariff Ceiling for Russian Energy Buyers
The newly signed legislation grants President Donald Trump the authority to impose tariffs of up to 100% within a 30-day window on goods from the five largest importers of Russian natural gas or crude oil. According to the report, these penalties could also target nations that knowingly initiate new purchases of Russian energy or those identified as the top five facilitators of Russian sanctions evasion.
The law specifically targets a "shadow fleet" of tankers used to bypass existing restrictions, as well as Russian banks, officials, and the defense industry.. The primary goal is to starve Moscow of the financial resources used to sustain its war against Ukraine, which has persisted for over four years.
A 40-Year Shift in Congressional Tariff Authority
This measure represents a historic pivot in U.S. governance; White House legislative director James Braid noted that it is the first time in nearly 40 years that Congress has granted new tariff authorities to the executive branch. The bill passed with significant bipartisan support, securing 86-11 votes in the Senate and 262-159 in the House.
The legislation serves as a final legacy for the late Republican Senator Lindsey Graham, who championed the bill before his death in July. This shift in power comes after President Donald Trump imposed tariffs of up to 50% on more than 80 countries since January 2025,many of which were later overturned by the Supreme Court for exceeding executive authority. Because this new law specifically mandates the duties, legal challenges may prove more difficult for affected nations.
China, India, and the Risk of 'Long-Arm Jurisdiction'
The geopolitical fallout is already surfacing, as China and India remain among the most significant buyers of Russian oil. china has explicitly opposed what it calls "long-arm jurisdiction" that lacks a basis in international law, while India has cautioned that these tariffs could severely damage bilateral relations with Washington.
As reported, the law provides a narrow exception for countries that import less than 15% of Russia's natural gas exports, provided they have made significant efforts to reduce those imports. however, the lack of firm criteria for how the "top-five" lists are calculated has left countries like Brazil and Japan speculating whether they will become targets.
The Diesel Dilemma for Hungary, Slovakia, and Ukraine
One of the most precarious aspects of the law is its potential to accidentally harm the very nation it intends to help. Jeannette Chu of the National Foreign Trade Council warned that if tariffs successfully reduce Russian energy flows to Europe, Ukraine could suffer a shortage of refined diesel products.
Ukraine currently relies on diesel processed in refineries located in Hungary and Slovakia. If these refineries lose access to Russian crude due to U.S. pressure, Kyiv could face indirect economic costs and energy instability, creating a strategic paradox where sanctions on Moscow inadvertently squeeze the Ukrainian economy.
National Security Waivers and the November Midterm Clock
Despite the sweeping powers, the law includes a broad "escape route" for the administration. President Donald Trump possesses the discretionary authority to waive tariffs or sanctions entirely if he determines it is necessary for national security reasons, a loophole that former Treasury official Ben Harris suggests is entirely discretionary.
The timing of these tariffs is also politically sensitive. With the November midterm elections approaching, analysts suggest the administration may be hesitant to trigger price hikes that could alienate voters already frustrated by inflation. To navigate this,some experts suggest the White House might implement a "zero-rate" tariff initially, reserving the right to increase the rate after the elections.
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