An Illinois Army veteran has been charged in federal court with threatening to kill a Republican congressman.

Rochester resident Randall Tarr, 64, was charged with communicating threats to injure a person and threatening to assault, kidnap, or murder a federal official. The charges stem from a Nov. 25 phone call to Republican Rep. Rodney Davis’s office.

According to court documents, Tarr became enraged after seeing one of the three-term congressman’s commercials. Investigators said he left a voicemail on Davis’s office phone.

“You backing the Russians, boy?” Tarr said. “What’s wrong with you? Are you … so f---ing stupid? I was in the military for eight years, and you son of a bitch, are backing the Russians over our own intelligence?"

“What is wrong with you, Rodney? Oh my God. I’m not voting for you next time. You f---er,” he continued. “I don’t care if you back Trump. But stupid son of a bitch, you’re gonna go against our military and back the Russians.”

“I’m a sharpshooter. I could. I’d like to shoot your f---ing head off you stupid mother---er,” Tarr said.

When contacted by law enforcement, Tarr said he called the phone number off of Davis’s commercial and left the voicemail and regretted the words he used.

“I said I had been a sharpshooter in the Army. I didn’t realize I said anything about shooting him. I might have. I don’t even own a weapon,” Tarr told the Associated Press . “I wish I could just take it all back and just say he’s a lousy [expletive] for backing the Russian theory.”