Trump lashes out at Mueller for alleged conflicts of interest

President TrumpDonald John TrumpLiz Cheney: 'Send her back' chant 'inappropriate' but not about race, gender Booker: Trump is 'worse than a racist' Top Democrat insists country hasn't moved on from Mueller MORE on Sunday renewed his accusations that special counsel Robert MuellerRobert (Bob) Swan MuellerTop Republican considered Mueller subpoena to box in Democrats Kamala Harris says her Justice Dept would have 'no choice' but to prosecute Trump for obstruction Dem committees win new powers to investigate Trump MORE has "conflicts of interest" in his investigation of Russian interference in the 2016 presidential election, citing a previous business dispute between the two men.

In a series of tweets attacking the special counsel's credibility, Trump noted that he and Mueller had "a very nasty & contentious business relationship."

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Trump has alleged on multiple occasions via Twitter that Mueller has unspecified conflicts of interest, but Sunday's tweet marks the first time he's elaborated beyond such accusations.

The president seemingly confirmed a New York Times report from January that said Trump attempted to fire Mueller in June 2017 over alleged conflicts of interest.

The Times reported that Trump listed three conflicts he believed should disqualify Mueller: A dispute over fees at Trump’s National Golf Club in Virginia; his interview for FBI director before being named special counsel; and Mueller’s previous employment at a law firm that represents Trump’s son-in-law, Jared KushnerJared Corey KushnerTrump talks to Swedish leader about rapper A$AP Rocky, offers to vouch for his bail Trump: 'We already started' talks to get A$AP Rocky home from Sweden Kim Kardashian West thanks Trump, Kushner for helping efforts to free A$AP Rocky from Swedish jail MORE.

Trump reportedly backed off his demand after White House counsel Don McGahn refused Trump’s order and threatened to quit.

Multiple reports indicated Trump interviewed Mueller for the vacancy, but it's unclear if Trump turned him down for the position before he was named special counsel in May 2017.

Trump's accusations about Mueller's alleged conflicts of interest came amid a string of tweets in which he claimed the special counsel's team is filled with Democrats.

Trump also claimed Mueller's probe was sparked by the so-called Steele dossier and questioned why the special counsel was not investigating Democrats.

The Mueller probe was launched by Deputy Attorney General Rod RosensteinRod Rosenstein10 questions for Robert Mueller What to expect when Mueller testifies: Not much Trump says he won't watch Mueller testimony MORE, a Trump appointee, days after the president fired former FBI Director James ComeyJames Brien Comey10 questions for Robert Mueller Comey pens blog revealing what he would ask Mueller in upcoming testimony FBI's spreadsheet puts a stake through the heart of Steele's dossier MORE and said it was because of the Russia investigation, actions that drew allegations that he was seeking to obstruct the FBI's investigation of Russian interference in the 2016 election. 

The president has attacked Mueller's investigation with increasing regularity in recent months, frequently decrying it as a "witch hunt" and a "hoax" in an attempt to discredit Mueller and his probe.

The special counsel has thus far indicted more than 20 Russian nationals as part of his probe. He has also indicted three Russian companies and several former Trump advisers. 

Former Trump campaign chairman Paul ManafortPaul John ManafortWebb: Questions for Robert Mueller Top Mueller prosecutor Zainab Ahmad joins law firm Gibson Dunn Russian oligarch's story could spell trouble for Team Mueller MORE is set to go on trial this week as part of the investigation.