There are moments when the usual lines in Washington blur, and senators from opposite sides of the aisle find themselves speaking in a single voice. This week, that voice was raised in opposition to a deal that a dozen senators—six Republicans and six Democrats—say hands Moscow a gift it should not receive. In a letter to President Trump, they called the diesel agreement with Russia “a betrayal” of Ukraine and a boon to an adversary, urging him to rescind it .
The deal, announced last week, temporarily lifts sanctions on Russian diesel exports, allowing Moscow to sell fuel on global markets. Trump has defended it as an effort to lower energy costs for Americans. But the senators argue it will have “negligible impact on fuel prices” while providing revenue that the Kremlin will “undoubtedly” use to finance its war in Ukraine and advance security cooperation with China, Iran, and North Korea . The amount Russia is initially supplying—300,000 metric tons—is less than a day’s supply for the U.S. transport sector alone, according to Energy Information Administration data .
The letter’s signatories include some of the Senate’s most senior Republicans: Mitch McConnell of Kentucky, Susan Collins of Maine, Lisa Murkowski of Alaska, John Cornyn of Texas, Thom Tillis of North Carolina, and Alan Armstrong of Oklahoma. On the Democratic side, Richard Blumenthal of Connecticut led the effort, joined by Jeanne Shaheen, Dick Durbin, Sheldon Whitehouse, Jack Reed, and Chris Coons .
What gives the letter its weight is not just its bipartisanship but its timing. Congress recently passed the Lindsey O. Graham Sanctioning Russia and Iran Act of 2026, a law that authorizes the president to impose tariffs of up to 100% on countries purchasing Russian oil and gas . Trump signed it. The senators’ argument is that the diesel deal runs counter to the spirit of that law—and that the president should use the authorities it grants him to pressure Moscow rather than offer it relief .
Trump’s response was dismissive. Asked about the deal, he said the senators “can’t really be serious,” adding that any restriction on oil would affect the rest of the world and that “anything that could help our farmers, our ranchers, I like” . The administration has not indicated whether it will rescind the deal. The law Trump signed sets an October 18 deadline for imposing or waiving new sanctions .
For Ukraine, the stakes are existential. The senators framed their appeal in terms of American leadership: “Maintain our legacy—and the duty America holds—as leader of the free world,” they wrote . Whether the president hears that appeal, or dismisses it as he did the question at his press conference, remains to be seen. What is clear is that for the first time in his second term, a significant bloc of Republicans is publicly breaking with him on a matter of war and peace, weeks before an election that will determine control of Congress.
The letter was dated October 13 and signed by 12 senators, six from each party. Trump has defended the diesel deal as a measure to lower fuel prices. The October 18 deadline under the Graham sanctions law is approaching. No waiver has been formally issued or denied.
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Sources: CBC News, Washington Times, CBS News, The Globe and Mail
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