President Donald Trump is weighing a potential diesel export ban as the administration seeks to contain domestic fuel prices ahead of the midterm elections. No final decision has been made, but administration officials have warned allies including the U.K. of possible supply disruptions and discussed a potential restriction with European countries. Energy Secretary Chris Wright has urged refiners to voluntarily reduce exports, build domestic diesel inventories and prioritize US consumers while resisting a blanket ban. The nationwide diesel average stood at $6.4391 a gallon on Tuesday, up about 74% from a year earlier, according to AAA. Washington has also pressed European countries to release strategic diesel reserves and discussed encouraging China to raise refinery production. More than 30 industry groups, including the U.S. Chamber of Commerce, have urged Trump against restrictions, arguing that an export ban could reduce refinery output, constrain supplies and increase costs.