The surge in US diesel prices is putting growing pressure on President Donald Trump to intervene in fuel markets, with Republican lawmakers calling for restrictions on diesel exports ahead of the November midterm elections.
But an export ban that appears designed to increase domestic supply could create a new set of problems for US refiners, consumers and global fuel markets.
US diesel prices reached a record $6.53 a gallon on Tuesday, according to AAA, as disruptions linked to the wars in Iran and Ukraine have reduced global fuel supplies. Diesel is particularly important to the US economy because it powers trucks, farm machinery, construction equipment and other parts of the supply chain.
The price surge has made diesel increasingly politically sensitive. Republican lawmakers from agriculture-heavy states have urged the administration to restrict exports, arguing that keeping more fuel inside the United States could ease costs for farmers, truckers and other businesses.
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Trump said Tuesday that he supported the idea, while Treasury Secretary Scott Bessent said the administration was examining whether a full or partial restriction would be feasible.
The timing is significant. The November 3 midterm elections are approaching, and high fuel costs are becoming an increasingly visible economic concern for voters and businesses.
Yet the economics of an export ban are more complicated than simply redirecting fuel from foreign markets to American consumers.
A global fuel shortage
The current diesel squeeze is largely the result of a deterioration in global supply.
The wars in Iran and Ukraine have disrupted fuel production and exports from major suppliers, including Russia and several Middle Eastern producers. Russia has traditionally been one of the world’s major diesel exporters, while attacks on Russian energy infrastructure have reduced refining capacity.
That has left international buyers competing for a smaller pool of available diesel.
The United States has consequently become an important source of additional supply. US refiners have increased exports to take advantage of strong international demand, even as domestic inventories have fallen.
US diesel inventories are now around 13% below last year’s level and at their lowest seasonal level in more than four decades, according to the data cited in the original analysis.
That has intensified pressure on Washington to keep more diesel at home.
Why an export ban looks attractive
The basic argument behind an export restriction is straightforward.
If American refiners are sending diesel abroad while domestic inventories are declining, preventing those exports could leave more fuel available inside the United States. Increased domestic supply could put downward pressure on prices, at least initially.
That is why the proposal has attracted support from lawmakers representing farming and transportation-heavy states.
But the US refining system cannot be treated as a simple pipeline in which diesel can be diverted from foreign consumers to American ones without affecting production decisions.
Refineries produce multiple petroleum products simultaneously, including diesel, gasoline and jet fuel. Their operating decisions are influenced by prices in both domestic and international markets.
If refiners lose access to overseas buyers for excess diesel, they may eventually have an incentive to reduce refinery operating rates rather than continue producing fuel that cannot be sold profitably.
That could reduce the production of other fuels as well.
The result could be a temporary increase in domestic diesel availability followed by tighter supplies of diesel and potentially other refined products.
Analysts and industry groups have therefore warned that restricting exports could provide limited short-term relief while creating wider market distortions.
Washington has already tried other measures
The administration has already explored ways to increase domestic fuel availability.
One measure has involved the Jones Act, which generally requires goods transported between US ports to be carried on vessels meeting US construction, ownership, flagging and crewing requirements. The administration issued a temporary waiver in March to make it easier for Gulf Coast refiners to move diesel to other parts of the country.
The administration has also focused on the disruption to Russian refining capacity caused by Ukrainian attacks.
Trump has urged Ukrainian President Volodymyr Zelenskiy to halt attacks on Russian energy infrastructure, arguing that damage to Russian refineries is contributing to higher diesel prices.
Those measures have not eliminated the supply pressure.
The underlying problem remains broader than US exports. Global refining capacity has been disrupted at the same time that demand for diesel remains strong.
The international cost
An American export ban would also have consequences beyond the US market.
Europe and other markets have increasingly relied on US refined fuel to compensate for disruptions elsewhere. Removing a major supplier from the international market could tighten global diesel supplies and push prices higher outside the United States.
That could create a difficult feedback loop for Washington.
Higher international prices would make diesel more expensive for foreign buyers, while US refiners could face weaker incentives to maintain high production levels if they were prevented from accessing those markets.
The United States would also risk becoming a less predictable supplier at a moment when global energy markets are already dealing with major disruptions.
The American Petroleum Institute has opposed restrictions, arguing that limiting US energy exports could compound existing refining and supply problems rather than resolve them.
The political pressure
The appeal of an export ban is therefore partly political.
With diesel prices above $6.50 a gallon, farmers, truckers and other fuel-intensive businesses are facing substantially higher operating costs. Republican lawmakers in competitive races have responded by calling for restrictions that could demonstrate immediate action on fuel prices.
For the Trump administration, however, the challenge is that a policy aimed at lowering prices cannot be judged only by its initial effect.
If an export restriction reduces domestic prices temporarily but subsequently discourages refining, tightens international supplies or pushes up the cost of other petroleum products, the policy could produce consequences different from those intended.
That is why the administration’s decision will depend heavily on how officials assess the interaction between domestic inventories, refinery capacity, export markets and global fuel shortages.
What comes next
The debate over diesel exports highlights a broader problem facing Washington: domestic energy prices are increasingly being shaped by disruptions far beyond US borders.
An export ban could increase the amount of diesel available to American buyers in the short term, but it would not restore refining capacity lost in other countries or resolve disruptions caused by the wars in Iran and Ukraine.
The administration must therefore weigh the immediate political demand for cheaper fuel against the longer-term consequences for US refining, consumers and global energy markets.
The question is no longer simply whether Washington can keep more diesel at home. It is whether doing so would actually produce lasting relief without creating another shortage elsewhere in the system.
With information from Reuters.
