By Paul C. BartonBut von Spakovsky said the idea that contributors to a 501(c)(4) can later pull the strings of a winning candidate “is the kind of anecdotal claim for which [progressives] have no proof.” Most winning candidates, he said, will have no idea who contributed to a 501(c)(4) that might have supported them.“I think there is not much evidence that policies at the federal level are tilted to the right. Barack Obama is still president, and last time I looked he has not been signing bills endorsed by Crossroads GPS,” said David Keating, president of the Center for Competitive Politics.











