No incumbent senator was unseated, and all eight open Senate seats went to Democrats, according to Senate President Therese Murray, who had a tough campaign of her own. Murray, whose district is among the most conservative in the state, beat Republican Thomas F. Keyes, with about 53 percent of the vote.
“We’ve been working at this for a while,’’ Murray said last night. “We had so many people from out of state come in from far-right organizations that we needed to run a big coordinated campaign.’’