Sen. Cory Booker Cory Anthony BookerThe movement to reform animal agriculture has reached a tipping point Watchdog confirms State Dept. canceled award for journalist who criticized Trump 3 reasons why Biden is misreading the politics of court packing MORE (D-N.J.) on Tuesday night ripped those who "enable" President Trump Donald John TrumpFederal prosecutor speaks out, says Barr 'has brought shame' on Justice Dept. Former Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick MORE, saying they will be judged by history.

Booker told MSNBC's Lawrence O'Donnell Lawrence O'DonnellMSNBC producer pens scathing exit letter: Ratings model 'blocks diversity of thought and content' MSNBC political analyst Karine Jean-Pierre joins Biden campaign Wallace says Biden gave 'skillful' answer on advice to voters on Reade MORE that "they will go down in history as despicable actors who have enabled" Trump, who he believes "is doing some of the worst things" in the history of the country.

“Those people who are enabling him, who witness the kind of things he does on a regular basis, those people that are enabling him, there’s a cold, frigid place under the historical eye," the 2020 Democratic hopeful said on "The Last Word."

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"They will go down in history as despicable actors who have enabled a president who’s doing some of the worst things in that office in the history of our country,” he continued before later adding, "the truth about Donald Trump will come out. I have a very low regard for people who know he’s doing wrong but defend him and empower him to remain in that office."

Speaker Nancy Pelosi Nancy PelosiDemocratic senator to party: 'A little message discipline wouldn't kill us' Overnight Health Care: New wave of COVID-19 cases builds in US | Florida to lift all coronavirus restrictions on restaurants, bars | Trump stirs questions with 0 drug coupon plan Overnight Defense: Appeals court revives House lawsuit against military funding for border wall | Dems push for limits on transferring military gear to police | Lawmakers ask for IG probe into Pentagon's use of COVID-19 funds MORE (D-Calif.) announced Tuesday a formal impeachment inquiry into Trump amid Democratic concerns that the president pressured Ukraine's president to look into former Vice President Joe Biden Joe BidenFormer Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick Bloomberg rolls out M ad buy to boost Biden in Florida MORE and his son Hunter Biden's dealings in Ukraine.

Trump has called the allegations a "witch hunt" and "nonsense" while fundraising off Democrats' impeachment effort.

Booker is one of several 2020 presidential candidates who have called for Trump's impeachment.

He currently stands at 2 percent in the RealClearPolitics index of polls.