On September 20, 2026, President Donald Trump posted on Truth Social that gas prices were much higher under Joe Biden than under his own presidency. However, data shows that average gas prices under Biden were $3.45 per gallon, while under Trump they have been $3.39, a difference of only 6 cents. Gas prices have soared to $4.48 per gallon following the start of the Iran war on February 28, 2026. Trump's claim drew criticism from his own supporters, who reported record high prices in their states. The issue is politically significant ahead of the midterm elections.
We’ll perform a deep-dive analysis of all sources and publicly available external materials, then prepare a structured timeline of events, an in-depth report explaining the background and context, and multiple perspectives.