Crossroads GPS Announces $25 Million Anti-Obama Ad Buy The presidential advertising wars have begun in earnest, with the latest salvo - a $25 million attack on President Obama by a Karl Rove-backed political group - set to begin on Thursday. The ad campaign by Crossroads GPS fills a Republican void on the airwaves in several battleground states, like Florida, North Carolina, Ohio and Virginia, which have so far been dominated by ads from the president and his supporters. Mr. Obama announced a $25 million advertising barrage of his own last week, starting with a series of commercials that heralded the president's efforts to help revive the economy. And the pro-Obama "super PAC," Priorities Action USA, began a campaign on Tuesday that attacked Mitt Romney's record as a private equity chief executive. The first ad in the Crossroads campaign is a 60-second spot that casts the president's first three years in office as a disappointment. "President Obama's agenda promised so much," it says. We need solutions, not just promises. Crossroads said it was putting $8 million behind the ad, which will run through the end of the month. "President Obama made commitments on core issues to the American people, and this ad holds him to account," said Steven Law, president of Crossroads GPS. One of the leading outside conservative advocacy groups, Crossroads and its sister organization, American Crossroads, plan to spend hundreds of millions of dollars in this election, much of it attacking the president's record. Along with groups like Americans for Prosperity, founded with backing from the Koch brothers, these organizations have been at work since the 2010 midterm elections with aggressive advertising. The sheer volume of negative ads already directed at the president is something the Obama campaign is trying to turn to its political advantage. The super PACs - in the aggregate sense - have become just as much an opponent in the eyes of the president's advisers as Mr. Romney.