The Trump administration moved Friday to temporarily lift sanctions on Russian diesel as President Donald Trump said Moscow had agreed to release large quantities of the fuel and suggested the U.S. could be a buyer.

The surprise announcement is the Trump administration’s latest effort in its struggle to bring the record diesel prices — caused by the ongoing war against Iran as well as Ukrainian attacks against Russian refineries — under control ahead of the midterm elections. It also could signal weakening of Trump’s support for Ukraine in its fight against Russia’s invasion, Democratic lawmakers said.

In a post on Truth Social, Trump said he had just “concluded a highly successful discussion” with Russian President Vladimir Putin, in which Putin agreed to supply hundreds of thousands of tons of diesel fuel “to the American and Global Marketplace.” Russia would “immediately supply” the fuel “based on the condition of their Diesel Refineries,” Trump added.

“Between our TOTAL CONTROL of the Strait of Hormuz, and this great announcement on Russian Energy, Diesel Prices for Americans and, indeed, the World, will be COMING DOWN, IN RECORD NUMBERS, AND FAST!” Trump wrote on Truth Social.