The lawyer who represented President Clinton during the Kenneth Starr investigation tore into 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 on Monday, saying it was a “massive dereliction” of duty to not draw a conclusion on whether 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 obstructed justice.

David Kendall, who currently represents the Clintons, penned an op-ed for The Washington Post to criticize Mueller’s conclusions after the nearly 22-month investigation.

“The failure to draw any conclusion on whether the president obstructed justice was a massive dereliction of the special counsel’s duty, and the report’s explanation of this failure is both incoherent and illogical,” Kendall wrote.

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Trump claimed “complete and total exoneration” after the Justice Department released the redacted report, but Kendall said that was “made possible by a massive flinch.”

“Mueller failed to follow Justice Department regulations, which say a special counsel ‘shall provide’ the attorney general a confidential report ‘explaining the prosecution or declination decisions reached by the Special Counsel.’ The special counsel is not authorized to bypass the required binary decision; he must decide to prosecute or not,” the attorney wrote.

Mueller’s report on Russian interference in the 2016 presidential election noted that the special counsel’s office was unable to “conclusively determine” that no criminal conduct occurred in regards to obstruction of justice. Attorney General William Barr Bill BarrHarris faces pivotal moment with Supreme Court battle Hillicon Valley: DOJ proposes tech liability shield reform to Congress | Treasury sanctions individuals, groups tied to Russian malign influence activities | House Republican introduces bill to set standards for self-driving cars McCarthy threatens motion to oust Pelosi if she moves forward with impeachment MORE and Deputy Attorney General Rod Rosenstein Rod RosensteinDOJ kept investigators from completing probe of Trump ties to Russia: report Five takeaways from final Senate Intel Russia report FBI officials hid copies of Russia probe documents fearing Trump interference: book MORE ultimately declined to pursue charges.

The Mueller report also cited several possible instances of obstruction of justice that the special counsel investigated, noting that the report “does not exonerate" Trump.

Kendall pointed to one of those instances, writing that it presented a more clear illustration of obstruction of justice than the actions of former President Nixon during the Watergate scandal.

The report points to Trump’s June 2017 meeting with former aide Corey Lewandowski Corey R. LewandowskiHow Trump can win reelection: Focus on Democrats, not himself Trump Jr. distances from Bannon group, says he attended 'single' event Bannon, three others charged with defrauding donors of 'We Build The Wall' campaign MORE during which Trump insisted that his aide tell then-Attorney General Jeff Sessions Jefferson (Jeff) Beauregard SessionsGOP set to release controversial Biden report Trump's policies on refugees are as simple as ABCs Ocasio-Cortez, Velázquez call for convention to decide Puerto Rico status MORE to “unrecuse” himself from overseeing the Mueller investigation.

“Trump allegedly directed Lewandowski to instruct Sessions to declare that Sessions knew ‘for a fact’ that ‘there were no Russians involved with the campaign’ because he ‘was there,’” Kendall wrote of the report. “And Trump ordered Lewandowski to direct Sessions to explain that Trump should not be subjected to an investigation ‘because he hasn’t done anything wrong.’”

Lewandowski declined to make those requests to Sessions and passed them off to a current White House aide who also declined, Kendall noted.

“This is not a hard case. The conduct is more aggravated than that recorded on the ‘smoking gun’ tape: Nixon’s 1972 direction that the CIA director tell the FBI that the Watergate investigation involved important national security matters and should not be pursued,” Kendall noted.