William “Mo” Cowan. PHOTO/AP William “Mo” Cowan of Massachusetts is the Senate’s newest member. The 43-year-old Democrat took his seat Thursday after a swearing-in ceremony led...
William “Mo” Cowan. PHOTO/AP Gov. Deval Patrick has named his former chief-of-staff William “Mo” Cowan to serve as interim U.S. senator for Massachusetts until a special...
