Keith Ellison hands Bernie Sanders his second congressional endorsement

Sen. Bernie Sanders will get a pre-debate boost from Rep. Keith Ellison, the co-chairman of the Congressional Progressive Caucus, who will become the second member of Congress to endorse Sanders’ insurgent presidential campaign Monday. Ellison joins his fellow Progressive Caucus co-chairman, Rep. Raul Grijalva, who endorsed Sanders last week at a rally in Tucson, where Grijalva’s congressional district is based. Sanders will face off against his rivals Tuesday at the first Democratic debate in Las Vegas. Sanders helped found the Progressive Caucus as a member of the House in 1991 and is currently the only member of the caucus from the Senate. The group, which started with six members, has grown into the largest caucus in the Democratic conference with 76 members.