Former Nixon White House counsel John Dean said Monday that he will testify that 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's alleged obstruction of justice is "strikingly like Watergate" when he appears before a congressional panel examining 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.

Dean, a key player in toppling Richard Nixon's presidency, told CNN ahead of the House Judiciary Committee hearing that he hopes to provide context around the allegations in the Mueller report.

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"I'm clearly not a fact witness, but hope I can give them some context and show them how strikingly like Watergate what we're seeing now and as reported in the Mueller report is," Dean said.

Dean said there are several examples in Mueller's report relating to obstruction of justice that parallel Watergate.

When asked which example is the most apt comparison, Dean said there are "too many."

Dean said Nixon and Trump were both "hands on, very early."

He also noted Trump's firing of former FBI Director James Comey James Brien ComeySteele Dossier sub-source was subject of FBI counterintelligence probe Judge will not dismiss McCabe's case against DOJ Democrats fear Russia interference could spoil bid to retake Senate MORE and Nixon's interference with an FBI investigation.

Trump has publicly maintained his position that there was "no obstruction" even calling out Dean as a "sleazebag attorney" on Twitter Sunday.