(AP) — The last time President Barack Obama celebrated workers' rights at a Wisconsin Labor Day event, there was barely a hint of the turmoil that would embroil the state later when public employees staged massive protests in an unsuccessful bid to keep their collective bargaining rights. Walker is running on the platform that he turned around the state's economy, thanks largely to his union rights law, which was his signature accomplishment. Burke can offer up excuses and try to hide from President Obama and his rotten approval ratings, but she can't hide from the fact that her and the president's failed economic policies are one and the same. "Public sector unions are clearly not better off," said Paul Secunda, labor law professor and program coordinator for the Marquette Law School's Labor and Employment Law Program in Milwaukee.