The Latest: Harris and Walz to hold rally in Arizona, while Trump will visit Montana

Vice President Kamala Harris and her new running mate will hold a rally in Arizona as part of their tour of electoral battlegrounds, visiting a state where Harris passed over a prominent Democrat in favor of Minnesota Gov. Tim Walz. Arizona Sen. Mark Kelly, a former astronaut and gun control advocate, had been a top contender for running mate. Meanwhile, former President Donald Trump is visiting Montana for a rally in support of Republican Senate candidate Tim Sheehy. The former president hopes to remedy some unfinished business from 2018, when he campaigned repeatedly in Big Sky Country in a failed bid to oust incumbent Democratic Sen. Jon Tester.