On average, the incumbent party loses 25 more congressional seats in midterms following gas price hikes

Change in the incumbent party's number of congressional seats, in elections since 1978

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Note: Gas prices are from January of the year prior (inauguration month) to October. Prices reflect the national city average retail price for unleaded regular gasoline per gallon, the only metric provided by EIA since 1977. Party breakdowns for congressional seats are based on election results and do not account for vacancies and successions.

Source: U.S. Congress, Energy Information AdministrationCatherine Allen/POLITICO