Attorney Alan Dershowitz asserted on Sunday that a president’s motives cannot be used to charge him or her with a crime while in office.

Dershowitz, who is a frequent defender of President TrumpDonald John TrumpGrassley: Dems 'withheld information' on new Kavanaugh allegation Health advocates decry funding transfer over migrant children Groups plan mass walkout in support of Kavanaugh accuser MORE in the Russia investigation and an opinion contributor to The Hill, argued on ABC’s “This Week” that a president can’t be charged with obstruction of justice for exercising his powers laid out in the Constitution.

“You cannot question a president’s motives when the president acts,” Dershowitz said. 

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“If a president pardons, that’s it. If a president fires, that’s it. You can’t go beyond the act and get into his motive or get into his intent,” he continued.

Host George Stephanopoulos questioned if that would apply to a president covering up a murder.

“It doesn’t matter,” Dershowitz responded. “The pardon is the pardon. The covering up of the murder may be an independent crime.”

A number of legal experts quickly questioned Dershowitz’s claim on social media. 

Asha Rangappa, a former FBI special agent and ABC analyst, refuted Dershowitz’s claim immediately. She argued that the Constitution implies that the president cannot obstruct justice because they swear to uphold the laws faithfully. 

Laurence Tribe, a Harvard law professor, called Dershowitz’s claim “ludicrous,” and argued it has “no basis in the Constitution’s text." 

Josh Chafetz, a law professor at Cornell University, acknowledged a pardon can’t be challenged because of motive, but disputed the thinking that motive can’t factor into obstruction of justice. 

“Obstruction *often* involves things that the obstructor otherwise has a legal right to do,” he tweeted.

“I can shred my financial records, but if I do it with the intent to obstruct an investigation, then I have committed obstruction of justice,” he added.

Dershowitz caused a stir last week when he lamented that his friends in Martha's Vineyard have ostracized him for his appearances on television defending Trump. However, he elaborated to The New York Times that he has tried embracing the isolation.

“I’m enjoying this,” Dershowitz said. “It’s a red badge of courage.”