 MEANWHILE, FORMER PRESIDENT DONALD TRUMP IS BACK ON THE CAMPAIGN TRAIL THIS EVENING AS SPECULATION GROWS OVER WHO HE'LL PICK AS HIS RUNNING MATE. CBS NEWS' JARED HALL, OR HILL, RATHER. JARED JOINS US NOW FROM NEW YORK. JARED, GOOD MORNING. GOOD MORNING, EMILY. YOU KNOW, NEARLY TWO WEEKS NOW AND PRESIDENT BIDEN HAS NOT BEEN ABLE TO SHAKE THIS CRITICISM TURNED CONCERN ABOUT HIS HEALTH AND ABILITY TO LEAD AFTER THAT ROCKY DEBATE. WITH TODAY'S NATO SUMMIT, HE HAS GOT A LOT TO PROVE NOT ONLY TO AMERICAN VOTERS, BUT ALSO TO THE WORLD.