Biden's uncertain political future divides Democrats as they return to Capitol Hill

Deeply torn over President Joe Biden’s candidacy, Democratic lawmakers are returning to Washington at a pivotal moment. They are deciding whether to work to revive Biden's campaign or edge out the party leader after his dismal performance in the debate. As Biden digs in, it's a make-or-break time for his reelection and the lawmakers' own political futures. Three top-ranking Democratic lawmakers are joining calls for Biden to step aside. At the same time, some of the president’s most staunch supporters are redoubling the fight for his presidency, insisting there is no one better to beat Republican Donald Trump.