 INDEPENDENT SENATOR JOE MANCHIN SAYS HE IS CONSIDERING SWITCHING BACK TO A DEMOCRATIC PARTY AFFILIATION TO CHALLENGE HARRIS. SHE IS SCHEDULED TO SPEAK AT AN NCAA EVENT THIS MORNING. PRESIDENT BIDEN IS STILL AT HOME IN DELAWARE, WHERE HE'S BEEN RECOVERING FROM COVID, BUT EXPECTED TO RETURN TO WASHINGTON THIS WEEK. CBS NEWS SPECIAL REPORT. I'M DEBORAH RODRIGUEZ.