In more debate news, New Jersey Senator Cory Booker and eight other Democratic presidential candidates have signed a letter to DNC Chair Tom Perez urging the DNC to change its qualification criteria for upcoming debates in January and February. The effort to change the criteria comes after Booker and Julián Castro — two of the most prominent candidates of color — did not make the threshold for Thursday’s debate in Los Angeles. Of the seven candidates who did qualify for Thursday’s debate, only one candidate — Andrew Yang — is a person of color.