Democrats on the House Judiciary Committee began their hearings on 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’s report Monday with a blast from the past: John Dean, the former White House counsel under President Nixon who testified before Congress in the Watergate era.

Democrats sought to use the testimony of Dean, a pivotal witness during the Watergate hearings and known critic of President Trump Donald John TrumpSteele Dossier sub-source was subject of FBI counterintelligence probe Pelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Trump 'no longer angry' at Romney because of Supreme Court stance MORE, to elucidate key details from the report, while Republicans tried to undercut his credibility.

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In a steamy hearing room, Democrats read directly from Mueller’s 448-page document and used props to highlight the episodes Mueller examined as potentially obstructive conduct.

Reps. Sheila Jackson Lee Sheila Jackson LeeGrand jury charges no officers in Breonna Taylor death Hillicon Valley: Murky TikTok deal raises questions about China's role | Twitter investigating automated image previews over apparent algorithmic bias | House approves bill making hacking federal voting systems a crime House approves legislation making hacking voting systems a federal crime MORE (D-Texas) and Steve Cohen Stephen (Steve) Ira CohenTennessee Rep. Steve Cohen wins Democratic primary Democrats exit briefing saying they fear elections under foreign threat Texas Democrat proposes legislation requiring masks in federal facilities MORE (D-Tenn.) cited page numbers as they regurgitated details about Trump’s conduct toward former White House counsel Don McGahn and the president’s efforts to have Mueller removed, which the special counsel examined in his inquiry into potential obstruction of justice.

In many cases, Dean responded by drawing parallels between Trump’s conduct and the cover-up scandal that engulfed the Nixon administration.

“When I read the Mueller report in detail, my first reaction was that McGahn took the high road, acting more like Elliot Richardson and Bill Ruckelshaus, and I thought that was admirable,” Dean said, comparing McGahn to the Nixon-era attorney general and deputy attorney general, respectively, who resigned amid the infamous “Saturday Night Massacre.”

At one point, Dean said, "I would say the Trump administration is in fast competition with what happened in the Nixon administration."

The hearing, which lasted more than four hours and also featured former prosecutors who have described Trump’s conduct as obstruction and one conservative legal expert, represented a deliberate effort by Democrats to move forward with their own investigations in the absence of testimony from Mueller himself and other key witnesses like McGahn.

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“Mr. McGahn will testify here before long,” House Judiciary Committee Chairman Jerrold Nadler Jerrold (Jerry) Lewis NadlerDemocrats shoot down talk of expanding Supreme Court Schumer: 'Nothing is off the table' if GOP moves forward with Ginsburg replacement Top Democrats call for DOJ watchdog to probe Barr over possible 2020 election influence MORE (D-N.Y.) said in opening remarks.

“Between now and then, we still have an obligation to investigate the deeply troubling evidence outlined by the special counsel — not merely the portions that implicate Russian nationals, as some have suggested, but the entire report, including the volume that lays out some of the president’s troubling behavior,” Nadler said.

The hearing featured some fiery moments from Republicans, who accused Democrats of engaging in political theater, with some noting that Dean’s views could be easily obtained by watching his regular appearances on cable news.

They noted he is a paid contributor for CNN.

In one memorable exchange, Rep. Jim Jordan James (Jim) Daniel JordanHouse panel pulls Powell into partisan battles over pandemic Sunday shows preview: Justice Ginsburg dies, sparking partisan battle over vacancy before election House passes resolution condemning anti-Asian discrimination relating to coronavirus MORE (R-Ohio) read aloud Dean’s tweets and asked him why at one point he asserted Trump was “incapable of accomplishing anything.” The exchange prompted Nadler to admonish Jordan for casting “aspersions” on Dean’s truthfulness as a witness.

Rep. Matt Gaetz Matthew (Matt) GaetzTrump faces tricky choice on Supreme Court pick Florida attorney general scrutinizing Bloomberg paying fines for felons to vote Lara Trump campaigns with far-right activist candidate Laura Loomer in Florida MORE (R-Fla.) also sought to land some punches by asking how many presidents Dean has compared to Nixon, while claiming he is “exploiting these accusations for his own economic benefit.”

Dean, who brushed off the criticisms, repeatedly maintained he was “not here as a fact witness” after Republicans suggested he lacked knowledge about material facts in Mueller’s report.

Democrats were likely hoping the Monday hearing would be a good show for cable, but the three news networks shifted their attention to New York after news of a helicopter crash in Manhattan.

It did catch the attention of the president, however. Trump called Dean a “loser” in remarks to reporters at the White House on Monday, denying any similarities between himself and Nixon.

“John Dean’s been a loser for many years,” Trump told reporters.

“You can’t impeach somebody when there’s never been a thing done wrong,” Trump said. “When you look at past impeachments. ... there’s a big difference, I don’t leave.”

Updated at 2:11 p.m. on Tuesday.