Diesel hits a nominal all-time high as Iran war squeezes the pump - and Congress heads for the exits

The number appeared on gas-station signs across the country on Friday and got worse over the weekend: $5.85 a gallon for diesel, then $5.88 by Saturday. ABC News and NPR confirmed both figures, with AAA data showing the price edging higher through Labor Day weekend. Neither figure, in nominal terms, has ever been seen at American pumps.

The cause is not complicated. The average price of a gallon of diesel has soared 55 percent since the outbreak of the Iran war in late February set off a historic oil shock, driven by Iran's near-closure of the Strait of Hormuz, which facilitates one-fifth of global crude supply. But diesel has been squeezed by more than one pressure at once. Some refineries in Asia have limited their diesel exports, further constraining global diesel supply, while Russian oil refineries have taken many diesel-refining units offline, causing Russia to curtail its own diesel exports. And American refiners compounded the problem themselves: with jet fuel prices rising sharply, U.S. refiners shifted production toward jet fuel to capture the price incentive, resulting in less diesel on the market, according to Jaime Brito, head of Dow Jones Energy.

The price stood at $3.72 on Feb. 27, according to the U.S. Bureau of Transportation, and it now tops the previous record high of $5.81 per gallon set on June 17, 2022, following Russia's invasion of Ukraine. That 2022 record held for more than four years. It lasted less than six months of the Iran conflict.

What it costs - and who feels it first

Diesel is not just a truckers' problem. The fuel powers what petroleum analyst Patrick De Haan of GasBuddy calls the "three t's" of the American economy: trains, tractors, and trucks. Fuel costs add up to 30 percent of the cost of food in the U.S., according to the Independent Grocers Alliance, a figure cited in AP's reporting. That arithmetic is already showing up at the store. Prices remain elevated for household staples including fruits, vegetables, beef, coffee, milk, and rice.

In April, Amazon rolled out a temporary 3.5 percent fuel and logistics surcharge on some third-party sellers, and UPS, FedEx, and the U.S. Postal Service moved to add fees on some packages they ship, citing rising operational costs. Those surcharges were put in place months before Friday's record. With diesel 55 cents higher since spring, companies that absorbed the earlier increase will face a fresh calculation.

Gasoline is up too, though less dramatically. The average price for a gallon of regular unleaded hit $4.15, up from $2.98 before the Iran war began - still well below the 2022 peak of nearly $5.02 a gallon nationwide.

The Washington angle: inflation math and the Fed

Diesel's record arrives at a moment the Federal Reserve cannot easily ignore. The annual inflation rate stood at 3.4 percent as of July, the most recent month on record, putting inflation more than a percentage point above the Fed's 2 percent target. August numbers are due next week. Employment in the United States grew by 162,000 jobs in August, and the unemployment rate held steady at 4.1 percent, the Bureau of Labor Statistics said Friday. A strong labor market, combined with above-target inflation, gives the Fed room - and arguably a reason - to raise rates at its September meeting.

Several Fed policymakers have indicated they would be open to raising interest rates if August's data does not show a continuing downward trend in inflation. Three of the committee's 12 voting members dissented at the last meeting in July, calling for an immediate rate increase. Markets sold off Friday on the jobs report, with traders pricing in a higher probability of a September hike - a move that would put the White House and the Fed on direct collision course again, weeks before the midterms.

Republicans in a bind

According to an Axios report published Saturday, incumbent Republicans are fretting about the impact that skyrocketing gasoline and diesel prices will have on the 2026 midterm elections, particularly since their own internal polling shows voters are placing blame for the price hikes on President Trump's war with Iran.

GOP operatives are not being quiet about it. One Republican operative told Axios: "Diesel's at an all-time high. Gas is about $4 a gallon. We can't message that away." Another Republican source, also quoted by Axios, described the bind more bluntly: GOP candidates don't have the option of distancing themselves from the president given his grip on the voters they need, with one source saying, "We're stuck on the boat with him whether we like it or not."

Transportation Secretary Sean Duffy went on Fox News Saturday morning to argue the price shock was driven by forces outside the administration's control, pointing to Russia and Ukraine. Vice President JD Vance, at a White House briefing earlier in the week, blamed Democrats for the high cost of living, including gas prices. PBS NewsHour noted that AP-NORC polling this summer showed two out of three U.S. adults disapproved of how Trump is handling the economy.

Fortune observed that the record diesel price could add to Republicans' political challenges ahead of November's midterm elections, with voters already sour on Trump's management of the economy. That framing now has a number attached: a year ago, diesel fuel averaged $3.70 a gallon - a rise of nearly 60 percent in 12 months, driven by both the Iran war and Russia's war with Ukraine, according to GasBuddy's De Haan.

Congress heads for the exits anyway

Against that backdrop, House Republican leadership quietly made a scheduling decision that compounds the pressure. House Majority Whip Tom Emmer's office informed Republican members that leadership had removed the weeks of Sept. 21 and Sept. 28 from the voting calendar, cutting eight previously scheduled legislative days. Under the revised schedule, representatives will return after Labor Day for four voting days before leaving Washington on Sept. 17. The chamber is not expected to resume regular legislative work until after the Nov. 3 midterm elections.

The immediate casualty of that calendar move is the CLARITY Act, the digital-asset market-structure bill that would divide oversight of crypto between the Securities and Exchange Commission and the Commodity Futures Trading Commission. The Senate is expected to hold a procedural cloture vote on the CLARITY Act as early as September 15. But the overlapping timeline leaves a window of barely 48 hours between the Senate vote and the House's adjournment. Alex Thorn, head of firmwide research at Galaxy Digital, said the shortened September session makes passage of the CLARITY Act before the elections "extremely unlikely."

The bill cleared the House in 2025 and moved to the Senate, where SEC Chair Paul Atkins has said in recent weeks that he expects it to pass. Atkins described the proposal in a Fox News interview as the most significant step toward establishing the United States as the crypto capital of the world. His support did not move the calendar. As of September 3, the contract tracking the bill's enactment on Polymarket had accumulated more than $7.2 million in trading volume, pricing in a 17 percent probability - down from 20 percent in late August.

The broader point is simpler than crypto. With eight fewer House days in September, Congress has less time for anything: oversight hearings, spending negotiations, or any response to record energy prices. Senate committees still need to mark up their version of the CLARITY Act, reconcile differences with the House text, and find floor time that competes with government funding deadlines and other year-end business. That calendar pressure applies to appropriations talks as well - the December 11 continuing-resolution deadline was already locked in, and with the House off the floor through October, negotiations on full-year FY2027 spending have effectively stalled before they begin.

What to Watch

• August CPI data, due next week: if inflation does not show a clear downward move from July's 3.4 percent, the Fed's September meeting becomes a near-certain rate-hike event - and the White House's pressure campaign on the central bank enters a new phase.
• Senate cloture vote on the CLARITY Act, Sept. 15: the 60-vote threshold is the first hard test of whether crypto legislation survives the compressed calendar. A failure ends the pre-midterm window entirely.
• AAA diesel tracker through September: Saturday's $5.88 figure already exceeded Friday's record. Any move past $6.00 would mark a new psychological threshold and sharpen the midterm liability for House Republicans in swing districts.
• Congressional response to fuel prices: watch for Democratic proposals to tap the Strategic Petroleum Reserve or impose a windfall tax on oil companies - neither is likely to pass, but both would put Republicans on record before November.
• Strait of Hormuz shipping data: commercial vessels were anchored off Bandar Abbas, Iran, as of September 4, a visual marker of continued supply disruption that analysts say must ease before diesel prices retreat meaningfully.

Sources: ABC News | NPR | Fortune | AFP/Yahoo Finance | PBS NewsHour | Crypto.news / Roll Call | Spendnode / Punchbowl News | The Crypto Times | Headlight News / U.S. Bureau of Transportation | Truthout / Axios