“Post Reports” co-host Martine Powers sits down with senior political reporter Aaron Blake, who writes The Post's Campaign Moment newsletter. They talk about why Vice President Harris chose Minnesota Gov. Tim Walz as her running mate, his strengths and weaknesses, and how he compares with the GOP’s vice president pick, JD Vance.Today’s show was produced by Laura Benshoff. It was edited by Lucy Perkins and Mary Jo Murphy and mixed by Sean Carter. Thanks also to Trinity Webster-Bass. Subscribe to Aaron’s newsletter, The Campaign Moment, here. Subscribe to The Washington Post here.