Why is Donald Trump campaigning in California, a state he’s almost certain to lose? The Associated PressTrump makes blue-state detour with Coachella rally CNNWhy Trump is headed into ‘the belly of the beast’: The strategy behind his blue state stops Fox NewsTrump plans rallies in solidly Democratic states in an unorthodox strategy for the election’s final weeks NBC NewsCalifornia Mayor Blasts Trump Ahead of Planned Rally: ‘He Ain’t Like Us’ Newsweek