State Senator Barbara L’Italien (D-Andover) announced today that she is exploring a race for the House seat currently held by Niki Tsongas. By my count, this brings the number of Dem candidates to three and so far all are from Andover. In fact, the other two concurrently attended Andover High, yet both had to move back to run. (Technically, the Constitution only requires residency in the state you represent, but living in the same district is an obvious political advantage.) They are former Chief of Staff to Marty Walsh Dan Koh and Cambridge City Councilor Nadeem Mazen. Two potential candidates who have publicly declined to run are Sen. Jamie Eldridge and Ellen Murphy Meehan. My understanding is that a L’Italien candidacy makes it quite a bit less likely that Sen. Eileen Donoghue will run.