text:  Live from NPR News in New York City, I'm Duahli Saikautau. A third Democrat serving in Congress is publicly calling on President Biden to end his campaign for a second term. But Biden is making clear to his base that despite a difficult debate performance, he's not leaving the presidential race. In the meantime, as NPR's Barbara Sprunt reports, he's having a festive July 4th at the White House.