CHARLOTTE, N.C. — U.S. Rep. Madison Cawthorn was cited for having a loaded gun at a Transportation Security Administration checkpoint at Charlotte Douglas International Airport on Tuesday morning, Charlotte-Mecklenburg police said. Police cited Cawthorn for possession of a dangerous weapon on city property after TSA agents found the gun in a bag and notified CMPD officers who are assigned to the airport, CMPD said on Twitter. The North Carolina Republican congressman violated a city ordinance by having the gun in the airport, according to police. Police said they released Cawthorn and confisca…