NPR News: 2nd Democratic Primary Debate Matchups Set: Sanders Vs. Warren and Biden Vs. Harris

2nd Democratic Primary Debate Matchups Set: Sanders Vs. Warren and Biden Vs. Harris
The debates will be held on July 30 and 31 in Detroit, Mich., from 8 to 10 p.m. ET each night. Moderators will be CNN's Dana Bash, Don Lemon and Jake Tapper.