Democratic lawmakers vowed to probe the allegations contained in a bombshell BuzzFeed News report that President Trump Donald John TrumpObama calls on Senate not to fill Ginsburg's vacancy until after election Planned Parenthood: 'The fate of our rights' depends on Ginsburg replacement Progressive group to spend M in ad campaign on Supreme Court vacancy MORE directed Michael Cohen to lie to Congress about plans to build a Trump Tower in Moscow during the 2016 presidential campaign.

Trump reportedly met with Cohen, his former attorney and fixer, at least 10 times to discuss the tower while maintaining to the public that he had no business ties in Russia.

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Two law enforcement officials told Buzzfeed News that the then-candidate backed a plan for Cohen to visit Russia and meet with President Vladimir Putin to begin negotiating the project’s construction.

House Intelligence Committee Chairman Adam Schiff Adam Bennett SchiffTop Democrats call for DOJ watchdog to probe Barr over possible 2020 election influence Overnight Defense: Top admiral says 'no condition' where US should conduct nuclear test 'at this time' | Intelligence chief says Congress will get some in-person election security briefings Overnight Defense: House to vote on military justice bill spurred by Vanessa Guillén death | Biden courts veterans after Trump's military controversies MORE (D-Calif.) tweeted Thursday that the allegation is "the most serious to date."

“The allegation that the President of the United States may have suborned perjury before our committee in an effort to curtail the investigation and cover up his business dealings with Russia is among the most serious to date,” Schiff tweeted.

The allegation that the President of the United States may have suborned perjury before our committee in an effort to curtail the investigation and cover up his business dealings with Russia is among the most serious to date. We will do what’s necessary to find out if it’s true. https://t.co/GljBAFqOjh — Adam Schiff (@RepAdamSchiff) January 18, 2019

“We will do what’s necessary to find out if it’s true.”

Fellow Intel panel Democrats Reps. Joaquin Castro Joaquin CastroHispanic Caucus members embark on 'virtual bus tour' with Biden campaign Hispanic caucus report takes stock of accomplishments with eye toward 2021 Democratic lawmakers call for an investigation into allegations of medical neglect at Georgia ICE facility MORE (D-Texas) and Eric Swalwell Eric Michael SwalwellSwalwell calls for creation of presidential crimes commission to investigate Trump when he leaves office 'This already exists': Democrats seize on potential Trump executive order on preexisting conditions Swalwell: Barr has taken Michael Cohen's job as Trump's fixer MORE (D-Calif.) both commented on the matter as well, with Castro saying that if the "story is true, President Trump must resign or be impeached."

Swalwell tweeted that this report was more "evidence of collusion."

If the @BuzzFeed story is true, President Trump must resign or be impeached. — Joaquin Castro (@JoaquinCastrotx) January 18, 2019

MORE evidence of collusion. If @realDonaldTrump directed his lawyer to lie, it was to conceal the underlying allegation from being exposed as true. #TheyColluded https://t.co/2Uvze6vl4B — Rep. Eric Swalwell (@RepSwalwell) January 18, 2019

Rep. Ted Deutch Theodore (Ted) Eliot DeutchShakespeare Theatre Company goes virtual for 'Will on the Hill...or Won't They?' Florida Democrat introduces bill to recognize Puerto Rico statehood referendum Matt Gaetz, Roger Stone back far-right activist Laura Loomer in congressional bid MORE (D-Fla.), who sits on the House Judiciary Committee, said on MSNBC’s “Morning Joe” that “if this report is true, the pesident of the United States violated the law,” adding that the BuzzFeed News article was “damning” and “terrible.”

BuzzFeed News also reported that Cohen informed 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 about the pressure from the president to lie to Congress.

Mueller, who is leading an investigation into possible collusion between the Trump campaign and Russia in 2016 and obstruction of justice, noted that the lies were made to “minimize links between the Moscow Project and Individual 1 in hopes of limiting the ongoing Russia investigations.”

Sen. Chris Murphy Christopher (Chris) Scott MurphyDemocratic senator calls for 'more flexible' medical supply chain to counter pandemics The Hill's 12:30 Report - Presented by Facebook - Don't expect a government check anytime soon GOP chairman to release interim report on Biden probe 'in about a week' MORE (D-Conn.) called for Mueller to "show Congress his cards before it's too late for us to act."

“Listen, if Mueller does have multiple sources confirming Trump directed Cohen to lie to Congress, then we need to know this ASAP. Mueller shouldn't end his inquiry, but it's about time for him to show Congress his cards before it's too late for us to act,” Sen. Chris Murphy (D-Conn.) tweeted.

Listen, if Mueller does have multiple sources confirming Trump directed Cohen to lie to Congress, then we need to know this ASAP. Mueller shouldn't end his inquiry, but it's about time for him to show Congress his cards before it's too late for us to act. https://t.co/ekG5VSBS8G — Chris Murphy (@ChrisMurphyCT) January 18, 2019

Rudy Giuliani, one of Trump’s personal lawyers, dismissed the report, telling The Washington Post, “If you believe Cohen I can get you a great deal on the Brooklyn Bridge.”

Cohen admitted in November to lying to Congress about Trump’s Moscow property plans. He made the false statements while testifying before two congressional intelligence committees in 2017.

Cohen was sentenced in December to three years in prison for lying to Congress and violating campaign finance laws regarding his payments during the campaign to two women who claimed to have had affairs with Donald Trump.