Trump Jr. targets Obama administration, FBI in tweet

Donald Trump Jr.Donald (Don) John TrumpTrump Jr. hits Howard Stern for going 'establishment,' 'acting like Hillary' Trump Jr., GOP senator lash out at Facebook for taking down protest pages on stay-at-home orders Trump jokes he'll 'look into' pardon for 'Tiger King' after asked by reporter at virus briefing MORE on Monday accused the Obama administration and the FBI of being corrupt as the latter continues its investigation into President TrumpDonald John TrumpFauci says his meetings with Trump have 'dramatically decreased' McEnany criticizes DC mayor for not imposing earlier curfew amid protests Stopping Israel's annexation is a US national security interest MORE.

Trump Jr.’s tweet comes days after the Justice Department notified lawmakers that the FBI failed to preserve six months' worth of texts from an agent who was removed from special counsel Robert MuellerRobert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE’s team.

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Agent Peter Strzok, who also worked on the FBI’s investigation into Hillary ClintonHillary Diane Rodham ClintonJuan Williams: Bush could strike blow for Biden Zuckerberg expressed concern to Trump over rhetoric amid protests: Axios Montana barrels toward blockbuster Senate fight MORE’s use of a private email server, was removed last summer from Mueller’s probe into possible collusion between the Trump campaign and Russia after it was discovered he had sent anti-Trump messages.

Some Republicans have seized on the news as an indication that Mueller’s probe was biased against the president.

President Trump has frequently railed against the Mueller investigation, calling it a "witch hunt" and insisting there was no collusion.