In a tense exchange with CNN’s Wolf Blitzer, Larry Pratt of Gun Owners of America said Wednesday his organization would seek to oust Sen. Pat Toomey (R-PA) from office.

“He ought to be held politically accountable and they way to do it is in a primary,” Pratt explained.

Though the Republican senator has an “A” rating from the National Rifle Association, his support for closing the so-called gun show loophole indicated he didn’t really support the Second Amendment, according to Pratt.

Earlier in the day, Toomey announced he had come to an agreement with Sen. Joe Manchin (D-WV) on legislation that would require sellers at gun shows and Internet retailers to conduct background checks. The legislation exempts certain private transactions and prohibits the federal government from creating a national firearms registry.