Trump is backing a diesel export ban. How much would that do?

Diesel prices have hit record highs this month, with the national average reaching $6.52 a gallon. President Trump said this week that he backs banning diesel exports as a way to bring prices down, though the White House had earlier said no such ban was under consideration.

Diesel powers the trucks, trains, and ships that move goods around the country, so even homeowners who don't drive a diesel vehicle feel the effects through higher prices on everything that gets shipped or trucked in. Prices have climbed nearly 80 percent since the war between the U.S., Israel, and Iran began, disrupting oil shipping routes and cutting into global fuel supply. One tracker estimates the increase has already cost American households almost $400 each.

Supporters of an export ban, including some Republican lawmakers, argue that keeping more diesel at home would ease prices for farmers, truckers, and consumers. Critics, including oil industry groups and some in the administration, say U.S. diesel prices are set by global markets, not domestic supply alone, and that a ban could backfire by discouraging production. Democrats have called for similar bans in the past but have mostly stayed quiet this time. One energy policy expert suggested a partial cut to exports, rather than an outright ban, could still meaningfully lower prices in the short term.

For now, no policy change has been made. If diesel costs keep affecting shipping and delivery prices, homeowners may see the ripple effects in the cost of goods and services rather than at a gas pump directly.