CAMBRIDGE, Mass.—A Massachusetts state senator who injured two people in a hit-and-run accident has pleaded guilty and been sentenced to six months home confinement. Sen. Anthony Galluccio, a Democrat from Cambridge, pleaded guilty Friday to leaving the scene of an accident in the Oct. 4 crash in Cambridge. The 42-year-old has said he made a "serious error in judgment" when he drove away after his SUV rear-ended another vehicle. A 13-year-old boy and his father received minor injuries. In Cambridge District Court Friday, Galluccio said he deeply regrets his actions. The judge ordered Galluccio to surrender his driver's license for...