Mo Cowan wraps up six months as Massachusetts’s temporary senator, with no plans to come back.
June 20, 2013 Sen. Mo Cowan (D-Mass.) talks with Sen. Heidi Heitkamp (D-N.D.), center, during a final Commonwealth Coffee event at his office in the Russell Senate Office Building in Washington. Massachusetts voters are heading to the polls Tuesday for a special election to choose a permanent senator to succeed Cowan, who was tapped in late January by Gov. Deval L. Patrick to replace John F. Kerry. Sarah L. Voisin/The Washington Post Buy Photo