Liz Truss left stage in anger after lettuce banner prank at pro-Trump event. Pranksters hoisted banner behind her reading “I crashed the economy,” prompting her to storm off. Led By Donkeys group claimed responsibility. Truss had endorsed Trump before the incident. The former PM’s swift exit was caught on video. Truss has faced past lettuce-related incidents. Polls suggest her support could hinder Tory leadership candidates.