A desperate search unfolded across a dark Wisconsin lake after Republican gubernatorial candidate Tom Tiffany’s powerless plane plunged into the water and disappeared beneath the surface with rescuers unsure where he and his pilot had gone.Dramatic dispatch audio captures crews calling for more ambulances, engines and boats as they raced to find the two men and tracked the last GPS location of a phone believed to be underwater."We’re going to be in search for a down plane," one responder warned.WISCONSIN GOP GOVERNOR CANDIDATE SWIMS FROM SINKING PLANE AFTER EMERGENCY LAKE LANDINGHours after le...