Congressman Tim Walz joins a group of sportsmen from around southern Minnesota to kick off "Sportsmen for Walz."The congressman, an avid hunter, is releasing a new radio advertisement to tout his endorsement by the National Rifle Association.Sportsman for Walz includes hunters, anglers and others committed to habitat preservation and outdoor recreation.Chris Cox, of the NRA, gives Walz an "A-rating" for his strong support of second amendment freedoms and hunting heritage.