Bill Maher called Republicans "treasonous rats" on Friday after the release of a House Intelligence Committee memo claiming that the FBI and Justice Department used politically funded evidence to justify surveillance on the Trump campaign. 

"Forget Groundhog Day," the host said in his opening remarks on HBO's "Real Time with Bill Maher."

"The only large, rat-like creature I'm concerned about is Devin NunesDevin Gerald NunesThe Hill's 12:30 Report — Presented by Kidney Care Partners — Lawmakers scramble as shutdown deadline nears ‘Fox & Friends’ host asks if McCabe opening FBI probe into Trump was attempt to ‘overthrow government’ Nunes says GOP lawmakers looking through Russia transcripts, will make DOJ referrals MORE," he said, referring to the California Republican chairman of the committee that compiled the memo.

"Of course it's not fair to single him out. All the Republicans these days are treasonous rats," Maher said. 

The memo, based on classified materials and made public this week by President TrumpDonald John TrumpSchiff urges GOP colleagues to share private concerns about Trump publicly US-China trade talks draw criticism for lack of women in pictures Overnight Defense: Trump to leave 200 troops in Syria | Trump, Kim plan one-on-one meeting | Pentagon asks DHS to justify moving funds for border wall MORE after a push from congressional Republicans, says that top officials at the Justice Department and FBI based a Foreign Intelligence Surveillance Act warrant for former Trump campaign adviser Carter Page on evidence partly funded by the Democratic National Committee. 

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Republicans are saying that the memo shows clear political bias within the FBI and DOJ.

Maher, known for his barbs against Trump and Republicans, went on to joke that House Republicans are "true patriots" for their attacks against the law enforcement institutions.

“Yes, because they’re in law enforcement and the Trump crime family commits crimes, so that’s what they’re supposed to do. It’s like saying the exterminator is biased against the termites," he said. 

Maher also knocked the Republicans for treating the memo like a "smoking gun" casting doubt on the ongoing federal probe into whether Russia influenced the 2016 election.

“Trump declassified this Nunes memo, which is supposed to make us think that our own top law enforcement people are crooked so Trump can get away with his Russia crimes," Maher added. "Problem is, Republicans talk about this memo as if it’s some smoking-gun piece of evidence they uncovered. No, they wrote it!"