Vice President Kamala Harris picked Minnesota Gov. Tim Walz to be her running mate on Tuesday, choosing an affable longtime politician who Democrats hope can keep newfound party unity alive in a campaign barreling toward Election Day. Harris said in a post on social media that Walz has “delivered for working families.” The two will appear together in Philadelphia at an evening rally. MORE: https://www.cbs8.com/article/news/nation-world/harris-to-introduce-her-running-mate-tuesday/507-dc86be66-9eb1-412a-829f-1810dd245b69