 President Biden is still trying to put his troubled debate performance in the rearview mirror. The latest from CBS's Christiane Bilidis. President Joe Biden sought to reassure Democratic voters about his ability to beat former President Donald Trump. You know, I've been doing this a long time. And I, honest to God, have never been more optimistic about America's future if we stick together. Yet the party remains divided as a growing number of House Democrats are calling for Biden to step aside.