Former Vice President Joe Biden is going on the offensive after being criticized by the two leading African American candidates in the Democratic primary, Senators Kamala Harris and Cory Booker. CBSN's Elaine Quijano spoke to CBS News 2020 campaign reporters Jack Turman, who covers Booker, and Bo Erickson, who covers Biden, along with NPR lead political editor Domenico Montanaro.
