Senator Scott Brown and Elizabeth Warren, the Harvard Law School professor and Democrat trying to unseat him, had their second debate tonight in a setting almost befitting the gladiators.

They met for an hour before a crowd of 5,700 at the University of Massachusetts Lowell’s Tsongas Center. David Gregory, host of the NBC News program “Meet the Press,” moderated. The debate was co-sponsored by the Boston Herald.

A full recap is below.

Recent polls, including a Globe survey published Sunday, have shown Brown slightly behind Warren.

During their first debate, he aggressively criticized her claim of Native American heritage, and also accused her of having a tax-first reflex as a politician.