Ed Markey has won the Massachusetts special election for the seat vacated by John Kerry. (see: http://www.borntorunthenumbers.com/2013/06/election-day-tomorrow-massachusetts.html)
Gabriel Gomez held an early lead (e.g., 52/48 with 24% of the precincts reporting) but urban votes have come in later for Markey. The tide turned with 38% of the precincts reporting when Markey first took the lead. As of this moment, at 9:03 PM, Markey holds a 52% to 48% lead with 61% of the precincts reporting and his lead is expanding with each update.
With this victory, Democrats maintain their 54-46 margin in the Senate (counting the two Independents who vote with the caucus).