 AND PRESIDENT BIDEN RETURNED TO THE CAMPAIGN TRAIL THIS WEEKEND TRYING TO RALLY SUPPORT. SOURCES TELL CBS NEWS THAT AT LEAST FOUR MORE DEMOCRATIC CONGRESSMEN CALLED ON THE PRESIDENT TO DROP OUT OF THE RACE DURING A MEETING WITH HOUSE DEMOCRATIC LEADERS. ALLIES OF THE PRESIDENT DESCRIBED THIS AS A CRITICAL WEEK AHEAD WITH LAWMAKERS RETURNING TO WASHINGTON TO DISCUSS NEXT STEPS.