By Joseph Ax NEW YORK (Reuters) - A federal judge on Thursday reluctantly struck down New York's limits on donations to independent political action committees as unconstitutional, potentially ushering in a new era of "super PACs" in state campaigns. District Judge Paul Crotty said the statutes could not survive First Amendment scrutiny in light of recent landmark Supreme Court decisions that have lessened restrictions on big-money political donors. "I think there is a risk of quid pro quo corruption, but the Supreme Court has not recognized it," he said during a hearing in Manhattan federal court. "We know what the Supreme Court has held, whether we like it or not, and I'm bound to follow it." The New York laws had limited the amount of money individual donors could contribute to independent political committees, known as super PACs, that operate separately from a candidate's campaign.