The state will host what’s likely to be the contest's decisive primary in June, but the campaigns are already marshaling their forces. Ted Cruz lands in California on Monday for two rallies in a state where voters won’t head to the polls for nearly 60 days, but the West Coast swing is anything but a diversion. It’s preparation for the campaign’s endgame. If Cruz is to stop Donald Trump short of 1,237 delegates, the final, decisive stand will almost certainly come in California. And that realization has spurred a behind-the-scenes arms race, with Cruz, Trump, John Kasich and their allies...