Though Trump campaigned on a pledge to get the price of gasoline under $2 a gallon, the price of gasoline has spiked to more than $4 a gallon since Trump started a war with Iran on February 28th. Now, families are dealing with high gas prices on top of broader rising costs tied to Trump’s tariffs and economic chaos. This Joint Economic Committee – Minority analysis finds that families in every state now have to spend much more to afford the gasoline that they need to commute to work, run errands, or pick up their kids.

The Committee calculated gasoline spending in 2026 using daily data on average gas prices from AAA through March 31st, data from Edmunds.com on the top-selling gas vehicles in the United States, and then combined it with federal data on gasoline consumption from the Federal Highway Administration and the Energy Information Administration.

Increase in the Cost of One Tank of Gas

The Committee finds that families now have to spend 35 percent more at the pump to fill their tanks than they did on February 28th. It now costs $145 to fill up just one tank of gas in an F 150, the best-selling car in America – an increase of $37 per tank compared to the cost a month ago.

Increase in Gas Spending Over One Month

Overall, the Committee finds that over the past month alone, American households paid a total of $8.4 billion more for gasoline compared to prices before Trump’s war on Iran. The table below shows that families in every state have had to spend millions more on gasoline over the last month.