About five police officers surrounded Mr. Fuller and escorted him out. As he was leaving, Ms. Proud said, he turned and yelled, “You’re all whores!”

Image J. Eric Fuller Credit... Joshua Lott for The New York Times

Mr. Fuller was also involved in a confrontation on Jan. 8, shortly before the attack on Ms. Giffords, which occurred at an event she held for her constituents outside a Safeway supermarket. He said in a long interview last week with The New York Times that he had argued there with a man he described as a former Marine after a heated discussion over politics. Gabriel Zimmerman, an aide to Ms. Giffords, separated the two.

Mr. Zimmerman was killed in the attack later that morning.

Mr. Fuller spoke dismissively of Republicans during the interview. “They appeal to simple-minded rednecks,” he said.

He said that he had had trouble sleeping after he was wounded and that he calmed himself the first night by writing down the Declaration of Independence, which he had memorized three decades earlier.

In the first days after the attack, his anger seemed especially strong. In the interview, he repeatedly denounced the “Tea Party crime syndicate,” and said he placed some of the blame for the shooting on Sarah Palin and other Republican leaders, saying he believed they had contributed to a toxic atmosphere.

He said he had expected to see protesters at Ms. Giffords’s event, and had planned “to shout them down because I can make a lot of noise.”

Speaking of Jared L. Loughner, who is accused of being the gunman, he said, “Saying anything about him would be a waste of breath. Recognizing his existence is a waste. I don’t like his face.”