CHARLOTTE, N.C. — U.S. Rep. Madison Cawthorn was cited for having a gun at a Transportation Security Administration checkpoint at Charlotte Douglas International Airport Tuesday morning, WSOC-TV reported. Cawthorn was stopped after agents found the North Carolina Republican congressman with a 9 mm handgun at Checkpoint D, according to the station. A TSA spokesman confirmed to The Charlotte Observer that agents “detected” and “recovered” a loaded Staccato 9 mm handgun at Checkpoint D at about 9 a.m. In an email, the spokesman said, “The TSA does not release passenger information in any incident…