A key lawmaker says recent court decisions blocking the suspensions of Vikings defensive linemen Pat and Kevin Williams threaten to undermine progress made in reducing performance-enhancing drug use among athletes at all levels. Rep. Henry Waxman said at a House hearing today that if the court rulings are not reversed, action by Congress may be needed. The California Democrat says the rulings could make sports leagues' testing programs unenforceable The NFL had attempted to suspend the two Vikings for violating its doping policy. But last month, a federal appeals court essentially allowed them to continue playing while the players' lawsuit proceeds in Minnesota state court.