Six GOP senators led by Mitch McConnell are pressing President Trump to scrap a Russian diesel deal as pump prices hit $6.30 ahead of the midterms.

President Donald Trump announced the arrangement on Oct. 9 in a Truth Social post, setting in motion the prospect of Russia shipping up to 3 million tons of diesel to U.S. and global markets in the coming months, Moneywise reported.

National average diesel now stands at $6.30 a gallon, AAA figures show, up 68% from late February, when the Iran war began. With just three weeks until the November midterms, that number has become a political problem in Washington as Republicans scramble for relief at the pump.

A bipartisan group of senators answered with a letter demanding the deal be undone and questioning its legality. Six Republicans signed on: Mitch McConnell of Kentucky, John Cornyn of Texas, Lisa Murkowski of Alaska, Alan Armstrong of Oklahoma, Susan Collins of Maine, and Thom Tillis of North Carolina.

"This deal is a gift to our adversary and a betrayal of our allies; it should be rescinded."

That line, from the senators’ letter to the president, frames the core objection. The signatories say Russian-origin fuel would undercut U.S. credibility and help bankroll Vladimir Putin’s war in Ukraine.

High pump prices collide with a foreign-policy red line

The letter does not dismiss the pain drivers feel. Senators recognized “the urgent need to lower energy costs for American families and address the disruptions caused by the war with Iran.”

They still rejected this particular fix. In their words, “allowing Russian-origin diesel into global markets will offer limited to no relief to Americans.”

Russia ranks as the world’s second-largest diesel exporter after the United States. Its energy shipments have faced U.S. sanctions, pressure that officials and markets have long tied to tighter supply and higher prices at home.

Trump’s team had also floated a diesel export ban before officials discarded the idea as one likely to backfire. The Russian import path was the option that moved forward instead.

McConnell keeps drawing hard lines in his final term

McConnell’s name atop the letter fits a broader pattern in his closing chapter. The Washington Examiner has detailed how the retiring Kentucky Republican has broken with the administration on nominees, tariffs he calls illegal, NATO posture, and Ukraine aid timing.

He voted against three Cabinet picks and helped sink the Trump-backed SAVE America Act. On a Justice Department proposal for an “anti-weaponization” fund tied to Jan. 6 pardons, McConnell unloaded in a statement.

"So the nation’s top law enforcement official is asking for a slush fund to pay people who assault cops? Utterly stupid, morally wrong, take your pick."

He has also said he expects to back most of what the administration is trying to accomplish, calling past fights irrelevant to the work ahead. The diesel letter shows where that conditional support still stops: anything he and his colleagues cast as a direct boost to Moscow.

Three of the six Republican signatories are set to retire at the start of next year. Collins remains locked in a re-election fight. Tillis, another name on the letter, has separately stood by McConnell through health questions, including after the veteran leader’s hospital stay and delayed return to the floor.

Midterms turn diesel into a ballot problem

Energy costs do not stay abstract when families fill tanks for work trucks, farm equipment, and long-haul routes. A $6.30 national average, after a 68% climb tied to the Iran war’s start, lands hardest on the voters Republicans need in November.

That is why the Washington scramble has been so sharp. Lower prices are the shared goal. The fight is over means, and over whether Russian barrels can ever be part of an American solution while sanctions and the Ukraine war still define the relationship with Putin.

McConnell has used similar pressure tactics on other national-security money fights, including when he and allies demanded action on stalled Taiwan arms funding. The diesel letter follows that same template: public, pointed, and aimed at the White House.

Tillis has also gone out of his way to argue that McConnell’s mind remains sharp after time away from the chamber. The diesel push underlines that the Kentucky Republican still intends to spend his remaining leverage on foreign-policy red lines, not fade quietly.

Succession nerves already run through the GOP’s older ranks, a theme familiar from debates over long-serving members such as when Grassley fretted about who might fill his seat. McConnell’s choice to keep picking fights on Russia and energy shows retirement has not softened his sense of what the party should refuse.

What the letter leaves unanswered

Public details on the deal remain thin beyond the headline figures. Reporting describes a prospective flow of up to 3 million tons in the coming months, not a completed ledger of cargoes already landed. The full Truth Social text was not quoted in the initial article, and the letter’s complete bipartisan roster beyond the six named Republicans was not listed in the same account.

Exact legal theories behind the senators’ “legality” challenge were also not spelled out in the published excerpts. What is plain is the demand itself: rescind the arrangement, keep Russian diesel out, and find another way to ease the squeeze on American drivers.

Trump cast the deal as a supply answer after prices exploded. His critics in both parties cast it as a strategic own-goal. Those two claims now sit on the same desk in the final stretch before voters weigh in.

Drivers need cheaper fuel without Washington pretending Moscow is a normal vendor. Sanctions, alliances, and the pump price cannot be wished apart, and November will not wait for the argument to resolve itself.