President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE's personal attorney, Rudy Giuliani Rudy GiulianiThe Hill's Campaign Report: GOP set to ask SCOTUS to limit mail-in voting CIA found Putin 'probably directing' campaign against Biden: report Democrats fear Russia interference could spoil bid to retake Senate MORE, said Sunday that "it would not have been obstruction of justice" if Trump had fired special counsel Robert Mueller Robert (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.

“Had he done it, it would not have been obstruction of justice because there were very good reasons to fire Mueller," Giuliani said during an interview on "Fox News Sunday."

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Giuliani argued that Mueller had a staff of attorneys that were "very, very questionable."

“Mueller hired a staff in which he had people that I would find very, very questionable as people that should be investigating Donald Trump," Giuliani said.

Giuliani added that the investigation could have been perceived as biased, something that "would give you a good faith reason to fire" Mueller.

Giuliani's remarks come after last week's release of Mueller's report, which details several instances of possible obstruction of justice on the part of Trump.

The report says that Trump in 2017 asked then-White House counsel Don McGahn to remove Mueller. McGahn refused, according to the report, which says he decided "that he would resign rather than trigger what he regarded as a potential Saturday Night Massacre."

Trump and his allies have previously argued that Trump had the constitutional authority to fire Mueller.

"If the president wanted to fire Bob Mueller he would have. In other words, he has the authority to do that," White House counselor Kellyanne Conway Kellyanne Elizabeth ConwaySpecial counsel investigating DeVos for potential Hatch Act violation: report George and Kellyanne Conway honor Ginsburg Trump carries on with rally, unaware of Ginsburg's death MORE said Sunday on ABC's "This Week."