President Donald Trump’s energy adviser, Jarrod Agen, attributed recent gasoline and diesel price pressure to refining-capacity constraints and supply disruptions in the Strait of Hormuz, despite sufficient crude oil supply. Speaking at an Axios House event on Tuesday, Agen reaffirmed the administration’s commitment to affordable gasoline and said Trump’s long-term objective of preventing Iran from acquiring nuclear capabilities justified the current price pain. Agen pointed to reduced refining capacity in Russia and underused capacity in China, while indicating that the Defense Production Act (DPA) and infrastructure projects could help address the bottleneck. Five presidential determinations signed Monday allow the Energy Department to deploy funds from Trump’s 2025 tax-and-spending law toward financing gaps, regulatory delays and other barriers affecting coal plants, refineries, gas-turbine manufacturers and transformer makers. National average diesel prices reached $6.5276 per gallon on Tuesday, while gasoline stood at $4.4750, according to AAA. A Brown University estimate put the cost of the Iran war to U.S. consumers through higher energy prices at more than $114 billion. President Trump has supported restricting U.S. diesel exports, but GasBuddy analyst Patrick De Haan said any relief would likely be concentrated in Gulf states and warned of complications for oil trade with Canada. He also said new refining projects would take years to influence prices, while producers have limited incentives to reduce gasoline prices because they answer to shareholders.