Markey seemed to bristle at the suggestion he's been outside of Massachusetts too long, even going as far as reciting his home address in Malden where he said he's lived for more than six decades.

"The question isn't where you're coming from, it's where you're going," Markey said before launching into his own main takedown of his rival. "Mr. Gomez, he's backing these tired old Republican ideas...That's a reflection of who he's going to be with down in the United States Senate."

The winner of Tuesday's election succeeds William "Mo" Cowan. Democratic Gov. Deval Patrick appointed his former chief of staff to serve as interim senator after Kerry stepped down.