politico'sus from newsroom shane goldmacher. runningok at potential mates for hillary clinton, let's virginia senator tim kaine, he will be campaigning with her this week. that put his potential candidacy for running mate? theim kaine is one of finallyist for hillary clinton. just as he was eight years ago for senator barack obama. he is from a swing state. he's a former governor. current senator, former head of the democratic party. forhecks awful lot of boxes hillary clinton and this is one of several public auditions. for elizabeth warren and others. have some private time behind the scenes. >> what are the downsize of his candidacy? >> the biggest downside for tim kaine is his record. it's not there's problems, he's not the most liberal candidate. excite the progressive base that has not been a big fan of hillary clinton. excited aboute bernie sanders and elizabeth warren aren't the type of people that will pick up big posters and get excited. the roler variable bill clinton would play. that a factor you think the former fir