By Andrea Shalal, Jarrett Renshaw, Nandita Bose and Richard Cowan WASHINGTON (Reuters) -Democratic presidential candidate Kamala Harris selected Minnesota Governor Tim Walz to be her running mate on Tuesday, choosing a progressive policy champion and a plain speaker from America’s heartland to help win over rural, white voters. Harris announced the selection in a text message to supporters. “I’m pleased to share that I’ve made my decision: Minnesota Governor Tim Walz will join our campaign […]