Crossroads Grassroots Political Strategies (GPS), a conservative group that has poured millions of dollars into attack ads, is airing a new

Texas donor of "Swift Boat" fame has long come to Tim Pawlenty's aid

Consultants urge ever-expanding amounts of ad time

American Crossroads had sought approval to coordinate its ads with candidates

Pro-Romney super PAC takes on roll of attack dog, uses vets of negative ad campaigns

Obama spends nearly $100 million on ads, early barrage seeks to define Romney as unfit

President Barack Obama will take center stage amid a barrage of negative ads in North Carolina.