“President Joe Biden is counting on an important political firewall to help him stave off Democratic defections and save his flagging re-election campaign: leaders of the Congressional Black Caucus,” NBC News reports. “On Monday, after a wave of congressional Democrats called for the president to step aside as the party’s nominee, Congressional Black Caucus Chair Steven Horsford (D-NV) reaffirmed his support for Biden in the wake of his disastrous debate performance against former President Donald Trump last month.