Diesel fuel prices in the United States have surged to around $6.53 per gallon — a roughly 75 percent increase year on year and a level not seen in many years even after adjusting for inflation. The spike, driven by geopolitical disruptions half a world away, is now squeezing farmers, truckers, food banks and construction firms, and is pushing the Trump administration toward a controversial policy response: a 90-day ban on diesel exports.

Energy analysts point to two main causes. The ongoing conflict in the Middle East involving Iran has disrupted supplies from the Arabian Gulf, while Ukrainian drone strikes on Russian oil infrastructure have knocked out a significant share of global diesel exports. Russia was, until recently, the world's largest diesel exporter after the United States, and the loss of its refining capacity has sent prices higher in markets across the globe — including deep into rural America. "It's sort of like a tax increase," said Bob McNally, founder of the Rapidan Energy Group and a former White House energy adviser. "A sudden, sharp, unavoidable tax increase you have no choice but to pay."

The consequences are being felt across a wide range of sectors. Farmers in Illinois and elsewhere report burning through budgets that could not have anticipated a 50 percent rise at the pump during harvest season, with some operations consuming tens of thousands of gallons per year. A construction equipment rental firm in Wheat Ridge, Colorado, says its overall operating costs have more than doubled. City Harvest, a New York-based food rescue organisation that runs a fleet of 23 trucks to supply over 400 food pantries across the city, estimates the surge will add roughly $100,000 in unexpected costs this year — threatening its goal of rescuing 100 million pounds of food. Trucking companies have begun passing on fuel surcharges to customers, which will in turn push up the price of goods across supply chains.

In response to pressure from rural voters and some Republican lawmakers, the White House is reportedly considering a 90-day ban on diesel exports. Proponents argue the measure would redirect supplies currently bound for Europe and Asia back into domestic distribution networks, easing prices in the short term. However, refining industry leaders and energy experts warn the move could backfire: without export markets, refineries would have an incentive to slow production, ultimately reducing domestic supply and driving prices higher. The plan is said to still be under development and is generating significant disagreement within the administration itself.

The proposed ban would also send shockwaves through European markets. The United States supplied roughly half of the European Union's diesel imports in August, a share that has grown as EU member states wind down purchases of Russian oil. News of a potential American export restriction has already pushed diesel pump prices in Europe to an average of €2.23 per litre, up from €2.16 the previous week. With winter approaching and energy markets already fragile, any sustained reduction in American exports could deepen the strain on both sides of the Atlantic.