President Trump's October 9, 2026, announcement of a deal with Russia to supply up to several million metric tons of diesel, paired with the Treasury's immediate General License 135 authorizing sales, delivery, and U.S. imports through April 7, 2027, forms the core catalyst for current market sentiment. This temporary sanctions relief targets elevated diesel prices—recently near $6.28 per gallon—ahead of midterms, yet faces legal challenges from the 2022 congressional ban on Russian energy imports and questions over Russia's constrained export capacity amid refinery outages. Volumes pledged remain modest relative to daily U.S. consumption of roughly 3.6 million barrels, limiting near-term price effects while highlighting policy uncertainty and potential congressional pushback.