Among the groups pressuring Republicans in the Senate to continue their blockade of President Obama’s Supreme Court nominee is Gun Owners of America, a gun lobby group that holds considerable sway on Capitol Hill despite its history of promoting wild conspiracy theories, frequent warnings to elected officials that they should fear assassination and deep ties to radical militia groups and white supremacists.

GOA has circulated a petition to its members claiming that Obama’s nominee, Merrick Garland, “would reverse your ability to own a gun” and “hates the Second Amendment,” basing its claims on exceedingly thin evidence. While these attacks on Garland’s record have been widely discredited, several Republican senators have pointed to the judge’s supposed disrespect for the Second Amendment as a reason to oppose him.

GOA’s general counsel, Michael Hammond, brought these claims to an op-ed in USA Today on Sunday, which GOA followed up with a video claiming again that Garland “hates the Second Amendment” and that if he gets on the court “good people will go to prison for exercising their constitutional rights.” Obama’s nomination of Garland, the video warns, is “the most significant step in his sordid trail towards transforming our nation.”

This paranoid and exaggerated language is typical of a group that has ties to the violent militia fringes of the Right and stays afloat by promoting conspiracy theories about various federal plots to snatch law-abiding people’s guns.

Tim Macy, the group’s chairman and the head of a “Second Amendment Coalition” on Ted Cruz’s presidential campaign, used similar rhetoric in March when he said that the Garland nomination was Obama’s “last-ditch effort” to “ruin the Second Amendment and destroy this country.”

The group’s executive director, Larry Pratt, went even further when he implied that Garland should fear assassination if he displeases gun groups. “Happily, the Second Amendment is all about people like Judge Garland, so there is a limit to how far he can go, I think,” Pratt told radical radio host Rick Wiles.

Pratt frequently makes similar comments. We wrote last year:

In an interview last year, Pratt said that being afraid of assassination was “a healthy fear” for members of Congress to have, because that’s what makes them “behave.” When Rep. Carolyn Maloney, D-NY, who had felt threatened by one of GOA’s members, complained about his comments, Pratt doubled down, saying that elected officials should fear “ the cartridge box” and accusing the congresswoman of being “ foolish” and having “a hissy fit .” Later, he boasted that Democratic proponents of stricter gun laws are “afraid of getting shot and they ought to be!”

On his weekly radio program last year, Pratt said that President Obama should learn from the example of Charles I, who was executed for treason in the 17th century:

Pratt’s view of the Second Amendment as a tool for a well-armed minority of insurrectionists to take on a government they disagree with comes straight from the fringe militia movement, which Pratt helped shape in the 1990s.

And that’s not all. According to the Southern Poverty Law Center, “In 1996, Pratt was forced to resign as co-chairman of Patrick J. Buchanan’s presidential campaign when it was publicized that he had been a speaker at the 1992 Gathering of Christian Men in Estes Park, Colo., where he rubbed shoulders with neo-Nazis, Klansmen, adherents of the anti-Semitic Christian Identity theology, and other radicals.”

More recently, Pratt was a cheerleader for the armed militias who staged a standoff with the federal government at Cliven Bundy’s ranch in Nevada, saying that the incident came “very close” to provoking “a civil war between the people and the government.”

In his role at the helm of GOA, Pratt is happy to stir up conspiracy theories and anti-government paranoia in an effort to turn his group’s membership against any attempt at reasonable gun law reform.

He has humored radical radio hosts who have suggested that the Sandy Hook school and Aurora movie theater massacres were inside jobs designed by the government.

And, as we wrote last year, Pratt has plenty of conspiracy theories of his own:

Here is Pratt talking with fringe radio host Stan Solomon about the possibility that President Obama will start a race war:

This is who the GOP wants to listen to on the Supreme Court?