Campaign aides to former Vice President Kamala Harris quizzed Minnesota Gov. Tim Walz on whether he was an agent for the Chinese Communist Party before selecting him as her running mate, according to a report. The intense vetting of Walz, which was reported by CNN, came about after Harris aides dug into the governor’s past, including the several trips he took to China before entering politics. Walz’s China ties stem from his years as a teacher before entering politics. He taught in China in the late 1980s shortly after the Tiananmen Square crackdown and later returned multiple times, leading student...