Mass. U.S. Senate Candidates Fail To Reach Ad Deal

A meeting between top campaign staffers for Republican U.S. Sen. Scott Brown and chief Democratic rival Elizabeth Warren has ended without a deal to curb political attack ads by outside groups.

Both candidates say they want an enforceable deal with financial penalties if a third-party group runs an ad designed to help their campaign or hurt their opponent.

Brown has suggested each candidate should donate half the cost of third-party ads to a charity of their choice and that the campaigns send joint letters to outside groups and broadcast outlets urging they avoid airing the ads.

On Friday, Warren's campaign released a statement saying Brown's proposal has "loopholes that Karl Rove could drive a tank through" but that she remains confident a "strong, enforceable agreement" can be reached.

Brown's campaign said Warren has "offered nothing but talk and excuses."

There have been ads from outside groups attacking both Brown and Warren.