The U.S. national average for a gallon of regular 87-octane gasoline has climbed back above the politically sensitive $4 threshold as U.S. military forces and Tehran enter a ninth day of tit-for-tat strikes. This level is significant because it is where fuel costs begin to alter spending and driving behavior among working-poor households, while also weighing more broadly on consumer sentiment, making it a key pressure point closely watched by the Trump administration ahead of the midterm election cycle.