Harris introduces her running mate, "Coach Walz," at an energetic Philly rally At an energetic rally in Philadelphia, Democratic presidential nominee Kamala Harris introduced her running mate, Minnesota Gov. Tim Walz, ticking through his varied resume and often calling him “Coach Walz” because of his tenure as a successful high school football coach. "In 91 days,” Harris said, “the nation will know Coach Walz by another name: vice president of the United States." The current vice president...