Joe Biden and Kamala Harris hold first campaign event as running mates

Joe Biden and Kamala Harris held their first joint campaign event in Wilmington, Delaware, where Biden praised his VP pick for her experience and readiness to tackle issues facing the nation. CBS News correspondent Natalie Brand, CBS News political contributor and democratic strategist Lynda Tran, and CBS News political analyst Leslie Sanchez joined CBSN's Lana Zak to discuss.