The mayor's choice was official after he held a recent 'people's caucus' where a group of Jackson residents voted to back Sanders. 'Sen. Sanders rose to the top,' Lumumba told BuzzFeed of the caucus, where he said representatives for Sanders, Joe Biden, Bloomberg and Elizabeth Warren gave a pitch. 'On a personal level, Sen. Sanders rises to the top for me because he has demonstrated the most consistency, and I think that his policies and what he has prioritized in his campaign speaks to the issues that we’re most concerned with in Mississippi.' As leader of the largest Mississippi city whose residents are mostly Democrats, Lumumba's endorsement could give a big boost to Sanders in the March 10 primary, which falls a week after Super Tuesday. Sanders will hopes the progressive mayor's backing gives him last-minute help courting African American voters in South Carolina.