Mittens was the fourth republican governor in a row.
Massachusetts prefers republican governors, but the trend may have changed since Mitt, he left with 34% approval, and after weakening the state party, he also lost the governor’s seat to the democrats ever since he left.
Yes, prior to Mittens, Weld and Cellucci were elected and Swift completed Cellucci's term. All were "Michael Bloomberg" Republicans. They shrugged, wore the "Republican" label, then winked and nodded as everybody went along with the charade.