
Former Massachusetts Gov. Mitt Romney (right) introduces and congratulates Sen.-elect Scott P. Brown, Massachusetts Republican, at his Boston victory party on Jan. 19, 2010, after he won the seat vacated by Sen. Edward M. Kennedy. The two Massachusetts Republicans have a history of supporting each other throughout their political careers, but neither is playing up that history now. (Associated Press)

Former Massachusetts Gov. Mitt Romney (right) introduces and congratulates Sen.-elect Scott P. Brown, Massachusetts Republican, at his Boston victory party on Jan. 19, 2010, after he won the seat vacated by Sen. Edward M. Kennedy. The two Massachusetts Republicans have a history of supporting each other throughout their political careers, but neither is playing up that history now. (Associated Press)

Sen. Susan M. Collins, Maine Republican, sponsored the Postal Service bill considered Wednesday with Sens. Joe Lieberman, Connecticut independent, Scott Brown, Massachusetts Republican, and Thomas R. Carper, Delaware Democrat. (Associated Press)

Sen. Susan M. Collins, Maine Republican, sponsored the Postal Service bill considered Wednesday with Sens. Joe Lieberman, Connecticut independent, Scott Brown, Massachusetts Republican, and Thomas R. Carper, Delaware Democrat. (Associated Press)

Sen. Scott P. Brown, Massachusetts Republican, is running neck-and-neck in his re-election bid against presumed Democratic opponent Elizabeth Warren, a Harvard professor known as President Obama's top consumer-protection adviser. Mr. Brown is seeking to localize the race after winning his seat two years ago on a national wave of tea party sentiment. (Associated Press)

Sen. Scott P. Brown, Massachusetts Republican, reported far less in campaign contributions than his Democratic challenger, Elizabeth Warren, during the three-month period from January through March. He raised about $3.4 million; the Warren campaign reported taking in $6.9 million. (Associated Press)

Sen. Scott P. Brown, Massachusetts Republican, has transferred from his state's National Guard to a unit in Maryland, which allows him to serve in the Pentagon. (Associated Press)

Sen. Scott P. Brown cites his mother's history of abusive relationships with men as he pushes for renewal of a domestic-violence law. (Associated Press)

Sen. Scott P. Brown