State representative Ruth Balser;[15]
state senator Mike Rodrigues;[10]
former state representative James Segel;[16]
David Simas, a former policy adviser to Governor Deval Patrick;[17]
state senator James Timilty;[10] and
state representative James Vallee,[10]
may also seek the Democratic nomination
politics1 and Green Papers have Marty Farren, Paul Heroux, Jules Levine, and Herb Robinson running on the Democrat side; Sean Bielat and Elizabeth Childs on the Republican.
Frank beat Bielat 54-43 in ‘10; it’s not a safe seat necessarily although you’d have to say Democrat favored.
The lines are slightly different in ‘12. I had taken a look at it some time ago.
http://www.freerepublic.com/focus/news/2815856