James Eric Fuller started ranting at the end of the program Saturday, then took a picture of a Tea Party leader and yelled, "You're dead."
"Deputies made contact with him, attempted to remove him, and he turned around and yelled at everybody and called them all whores," Pima County sheriff's spokesman Jason Ogan told The Associated Press.
Complete Coverage: Tragedy in Tucson
Fuller was taken away by law enforcement and later charged with threatening and intimidation, and disorderly conduct.
Fuller apologized through his girlfriend, Dorothy Deruyter.
He has been in a hospital since being involuntarily committed Saturday for a mental health evaluation but wrote a statement and called Deruyter.
Fuller apologized for his "misplaced outrage."
Fuller was one of 19 people shot when a gunman opened fire Jan. 8 at a meet-and-greet for Rep. Gabrielle Giffords. The congresswoman was critically injured and six people were killed.
Fuller was shot in the knee and back, and drove himself to the hospital, where he spent two days.
Deruyter said Fuller has no family or children, and was coping with the shooting almost entirely on his own and lost his temper.
Trent Humphries, co-founder of the Tucson Tea Party who was the focus of Fuller's outburst at a taping of ABC's "This Week" Saturday, told the Associated Press he is worried about threats he is receiving.
Humphries told the AP he was worried about Fuller's threat, and the dozens of other angry e-mails he has received from people blaming right-wing political rhetoric for contributing to the assassination attempt on Rep. Gabrielle Giffords.
"I had nothing to do with the murders that happened or the shooting of Gabriel Giffords," Humphries said.