Washington (CNN) Democrats are vowing to investigate whether President Donald Trump obstructed justice -- with some openly floating the prospect of impeachment or his resignation -- following a bombshell BuzzFeed report that Trump personally directed his former attorney Michael Cohen to lie to Congress.

"We know that the President has engaged in a long pattern of obstruction. Directing a subordinate to lie to Congress is a federal crime. The ⁦‪@HouseJudiciary‬⁩ Committee's job is to get to the bottom of it, and we will do that work," New York Democratic Rep. Jerry Nadler, the chairman of the House Judiciary Committee, whose panel would lead potential impeachment proceedings, tweeted Friday.

We know that the President has engaged in a long pattern of obstruction. Directing a subordinate to lie to Congress is a federal crime. The @HouseJudiciary Committee's job is to get to the bottom of it, and we will do that work. — (((Rep. Nadler))) (@RepJerryNadler) January 18, 2019

Citing law enforcement officials, BuzzFeed reported Thursday night that Trump directed Cohen to claim negotiations to build a Trump Tower in Moscow ended months earlier than they actually did. Cohen confirmed to special counsel Robert Mueller's team that Trump issued the order to lie to Congress, BuzzFeed reported.

Late Friday, Mueller's office disputed the BuzzFeed report as "not accurate."

"BuzzFeed's description of specific statements to the Special Counsel's Office, and characterization of documents and testimony obtained by this office, regarding Michael Cohen's Congressional testimony are not accurate," said special counsel spokesman Peter Carr in a statement.

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