 It's Morning Edition from NPR News. I'm A. Martinez in Los Angeles, California. And I'm Michelle Martin in Washington, D.C. Good morning. President Biden's debate performance last week rattled his supporters and ramped up calls for the 81-year-old to leave the top of the Democratic ticket. First Lady Jill Biden is among those saying the president will not step aside. And at a campaign rally in North Carolina Friday, Biden seemed to be making the case for why, despite the poor showing, he should stay the course.