U.S. gas prices are just barely below an average of $4 a gallon nationwide on Thursday, shortly after President Donald Trump signed an agreement with Iran that calls for Tehran to dilute its stockpile of highly enriched uranium and waives U.S.-backed sanctions on the country

"Average gasoline prices fell in 47 states over the last week, with the national average dropping..."

Line go up (as long as you believe).

Americans have collectively spent about $46 billion more on gasoline since the start of the war