After being escorted by Massachusetts Senator Elizabeth Warren and Secretary of State John Kerry to the front of the chamber, newly appointed interim Senator William “Mo” Cowan took his oath of office from Vice President Joe Biden Thursday afternoon. Massachusetts Governor Deval Patrick tapped Cowan as a temporary replacement for Kerry’s seat last week after the 28-year Senate veteran was confirmed to head the State Department. Cowan took his oath on the Senate floor -- left hand on his grandmother’s Bible -- before moving to the old Senate chambers for a ceremonial swearing-in with his ... Read More