Ex-Speaker calls Romney a “Massachusetts moderate” Tuesday in Iowa and says the Bay Stater cannot question his conservatism.

Gingrich: “To have somebody who was a Massachusetts moderate, who said he did not want to go back to the Reagan-Bush years, who voted as a Democrat for Paul Tsongas in ’92, who campaigned to the left of Teddy Kennedy, who, as recently as running for governor, said, ‘I’m really sort of a moderate, pragmatic.’ To have him run a commercial that questions my conservatism?”

Watch the video above.