Diesel price hikes: a ‘missile’ heading for Trump voters

What was the key factor that propelled Donald Trump back into the White House for a second term? If you’d asked him that a couple of years ago, said Virginia Heffernan in The New Republic, his answer would almost certainly have been the cost of living.

“The beautiful but simple word ‘groceries’,” he once rhapsodised. “I won on that word.” Well, we now know the word on which he’ll likely lose: diesel.

Supply disruptions caused by the Iran and Ukraine wars have had a particularly severe impact on diesel prices: they hit a record high of $6.52 a gallon in the US last week, up from an average of $3.63 at the start of 2025. The price hikes “aim a missile squarely at the voters Trump can least afford to alienate”, such as pickup truck owners, lorry drivers, and farmers in states such as Iowa. By upsetting the “diesel class, Trump may have bitten the final hand that feeds him”.

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‘Cheap appeal’

To fix this problem, Trump is toying with the idea of banning US diesel exports, said National Review. The policy has “cheap appeal” ahead of the midterm elections on 3 November, but it would only bring down prices for a short while, and only in some areas. While America makes more diesel than it consumes, pipeline constraints mean that most of it remains relatively close to refining hubs on the Gulf Coast.

Other areas of the US, such the Northeast and the West Coast, largely rely on diesel imports, so would end up paying even higher prices if the US further reduced global supplies of the fuel. What’s more, if Gulf Coast refineries were unable to export diesel, they’d soon run out of storage space for it and have to slash their output. Result? Not just less diesel, but also a reduced volume of other refined products such as petrol and jet fuel.

‘Fake fix’

A diesel export ban wouldn’t help America, agreed Catherine Rampell on The Bulwark. And it would cause major problems for countries that rely on these exports, such as Mexico, the UK and the Netherlands, which trade with the US in other oil-based products, and could well decide to retaliate in some form.

Still, this is the Trump White House we’re talking about – a team of people with “zero policy expertise” and “zero patience”, who care “only about what talking points will get them through the next news cycle, tomorrow’s consequences be damned”. The worse the opinion polls get ahead of the midterms, the more tempted Trump will be to reach for this “fake fix”.