With the presidency on the line in battlegrounds like Wisconsin and Pennsylvania, why would Donald Trump venture into California, one of the most solidly Democratic states, just weeks before Election Day? Trump is almost certain to lose California, and that won't change after his scheduled Saturday stop in Coachella, a desert city east of Los Angeles best known for the annual music festival bearing its name. Still, there are practical reasons for him to visit, despite the Republican nominee's prospects Nov. 5 in the most populous state. The former president lost California in a landslide in 2020. He did get...