A Republican member of Congress tweeted about an "illegal coup" against President Trump on Monday, responding to an account that has spread conspiracy theory content.

Rep. Paul Gosar of Arizona said on Monday he has a "tip" about how FBI agents have "colluded" with British agents and Democratic operatives.

"I have a tip. I think high level FBI agents may have colluded with British agents and Democrat operatives to initiate an illegal coup against @realDonaldTrump and @POTUS. I mean at least this bears a cursory review. Perhaps. Maybe," the congressman tweeted from his verified account, tagging Trump's accounts.

A number of Republicans have alleged Trump was the target of covert plan to boost his 2016 opponent Hillary Clinton and later undermine his presidency, raising questions about the origins of the counterintelligence investigation that focused on the Trump campaign's ties to Russia. With the completion of former special counsel Robert Mueller's investigation into whether the Trump campaign conspired with Russia, which the president dubbed a "witch hunt," Trump's GOP allies have championed Attorney General William Barr and U.S. Attorney John Durham who are now reviewing the Justice Department's and FBI's conduct during the Russia investigation.

The Washington Examiner reached out to his office for comment about the tweet. Afterwards, Gosar tweeted a follow-up message. "Some of you are missing the sarcasm here. Attached is the Mueller report. It starts with a meeting by @GeorgePapa19 and a British spy in London. Yet that remains uninvestigated by the FBI. Hence the tip," he said, tagging former Trump campaign adviser George Papadopoulos and linking to CNN's posting of Mueller's redacted report.

Some of you are missing the sarcasm here. Attached is the Mueller report. It starts with a meeting by @GeorgePapa19 and a British spy in London. Yet that remains uninvestigated by the FBI. Hence the tip. https://t.co/EoPvMgZG5w https://t.co/1YGgONzlom — Paul Gosar (@DrPaulGosar) August 12, 2019

Gosar has been a Republican congressman from Arizona since 2011. He won reelection last year after six of his siblings released an ad campaign endorsing his Democratic challenger David Brill.

His tweet Monday was a retweet of Majestic 12, an unverified account with 27,000 followers and a pinned tweet about QAnon and "the Plan."

I have a tip. I think high level FBI agents may have colluded with British agents and Democrat operatives to initiate an illegal coup against @realDonaldTrump and @POTUS . I mean at least this bears a cursory review. Perhaps. Maybe. https://t.co/wfIj79T2Gi — Paul Gosar (@DrPaulGosar) August 12, 2019

"1827 Big week coming up. See something, say something," the tweet said, which appears to be a reference to QAnon, along with a link to the FBI's "submit a tip" page.

QAnon is an online movement that originated on 4chan message boards with posts by an anonymous person going by “Q,” who claimed to be a government official with top-secret intelligence clearance and who made a variety of evidence-free claims about Trump covertly battling a series of deep state plots and global conspiracies.

Much of what the Majestic 12 account has tweeted about in the past few days relates to the apparent suicide of convicted sex offender Jeffrey Epstein, which has spawned a wide array of conspiracy theories.