 From ABC News, I'm Sherry Preston. President Biden continuing to play host in Washington as NATO marks 75 years since its founding. Tomorrow, the president will hold a news conference. Today, he is still fielding calls from some in his own party who want him to step aside in the presidential race. Here's ABC national correspondent Stephen Portnoy. Democratic leaders in Congress say they're standing by Biden, but former House Speaker Nancy Pelosi stopped short of that.