The Senate is headed for another showdown over free trade after Sen. Rand Paul (R-KY) announced legislation to wipe out President Donald Trump’s “Liberation Day” tariffs.

Paul is joining Sen. Ron Wyden (D-OR) and five other Democrats to introduce a measure that ends the emergency declaration Trump used to levy a wave of tariffs as high as 50% on dozens of nations. The resolution is privileged, meaning Senate Republicans have no choice but to hold a floor vote.