Vice President Vance stepped out of President Trump's shadow Wednesday, seizing on the GOP's midterm catastrophe to begin the explosive task of claiming MAGA as his own."The reason we lost is the war," Vance wrote in an extraordinary 600-word postmortem on X, blaming Trump's Iran campaign for Republicans' historic collapse.Why it matters: Vance's presidential ambitions are entangled in the wreckage of a war he privately opposed but publicly defended.