In the weeks leading up to the GOP primary for the U.S. Senate seat currently held by Democrat Debbie Stabenow, the race between John James and Sandy Pensler has heated up.With less than a month before the race, Pensler and his supporters have been running attack ads on James. Some of James' supporters, including former Seal Team 6 member Rob O'Neill, who is credited with firing the shots that killed Osama Bin Laden, and Michigan's native son Kid Rock, have spoken out against the ads.