Gov. Tim Walz showed us why he’s a serious contender to be Harris’ vice-presidential pick. On MSNBC Wednesday night, he swatted down Donald Trump and his fake populist running mate, J.D. Vance. As you probably know by now, Vance has smeared Democrats in general and Vice President Kamala Harris, in particular, as "childless cat ladies." It's not working out too well for him. There to pile on was Walz.