I’m thinking this guy has the IQ of a tree stump.

A staffer in the Flagstaff office of Rep. Paul Gosar (R-Ariz.) who used his Twitter account to trumpet the downfall of former Rep. Anthony Weiner (D-N.Y.) resigned Friday after Roll Call discovered violent messages he tweeted.

Roll Call learned on Friday that Blake Schritter, a caseworker and office manager in one of Gosar’s district offices, had posted messages about drunken exploits and his desire to gun down professors and postal workers, all the while working in the district that borders that of Rep. Gabrielle Giffords (D-Ariz.), who was the victim of an assassination attempt in January.

“I can’t believe how unprofessional liberal professors can be. I’m sitting here, cleaning my gun, thinking…this is a classroom!!!” Schritter, a graduate student in Northern Arizona University’s criminology program who also graduated from the school’s criminal justice program, posted on June 23.

On June 2 he tweeted: “The line at the post office is moving at a glacial pace. I’m ready to open fire with a handgun to get some damn service!”

Schritter, who answered the phone at Gosar’s Flagstaff office on Friday, first denied ownership of the account.

His Twitter account, posted under the moniker “drunkenbs,” disappeared after Roll Call contacted Gosar’s office for a response.

A Gosar spokesperson confirmed on Friday that Schritter was no longer working for the Congressman.