DARLENE SUPERVILLE, Associated Press WASHINGTON - President Barack Obama on Saturday sharply criticized a Supreme Court decision easing limits on campaign spending by corporations and labor unions, saying he couldn't "think of anything more devastating to the public interest." He also suggested the ruling could jeopardize his domestic agenda. In its 5-4 decision this week, the high court overturned two decisions and threw out parts of a 63-year-old law that said companies and unions can be prohibited from using their own money to produce and run campaign ads that urge the election or defeat of particular candidates by name. Portraying himself as aligned with the people and not special interests, Obama said the decision was unacceptable. "This ruling opens the floodgates for an unlimited amount of special interest money into our democracy," the president said in his weekly radio and Internet message.