BOSTON — U.S. Sen. Scott Brown and his chief Democratic rival Elizabeth Warren have signed a pledge to curb political attack ads by outside groups.
Warren on Monday sent a letter to Republican incumbent Brown urging him join her and sign an agreement to prevent third-party ads. Brown, who had initially proposed the pledge, signed the deal minutes later.
Top level staffers for both candidates failed to reach a deal during a meeting last week.
Warren in her letter said “we don’t want outsiders running this election” and said her agreement sews up loopholes in the proposal Brown made last week.
Under the deal, each candidate would donate half the cost of any third-party ad to charity if that ad either supports their candidacy or attacks their opponent.
Brown called the agreement a “great victory” for Massachusetts.