Joe Biden officially becomes the Democratic nominee for president

Democrats officially nominated former Vice President Joe Biden as their candidate for president during the second day of the Democratic National Convention. CBS News political correspondent Ed O’Keefe; CBSN political reporter Caitlin Huey-Burns; CBS News chief Washington correspondent, Major Garrett; CBS News political analyst Leslie Sanchez; and CBS News political contributor and Democratic strategist Antjuan Seawright join Elaine Quijano to discuss. Source