A Democratic member of the House warned Tuesday that any move by President Trump Donald John TrumpHR McMaster says president's policy to withdraw troops from Afghanistan is 'unwise' Cast of 'Parks and Rec' reunite for virtual town hall to address Wisconsin voters Biden says Trump should step down over coronavirus response MORE to exit NATO would be grounds for removal from office.

Rep. Jackie Speier Karen (Jackie) Lorraine Jacqueline SpeierOvernight Defense: House to vote on military justice bill spurred by Vanessa Guillén death | Biden courts veterans after Trump's military controversies House to vote on 'I Am Vanessa Guillén' bill Overnight Defense: Trump's battle with Pentagon poses risks in November | Lawmakers launch Fort Hood probe | Military members can't opt out of tax deferral MORE (D-Calif.) told CNN's "New Day" that Congress or the president's advisers would be forced to take "profound" action to prevent Trump from exiting the decades-old military alliance, formed following World War II.

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"It had better be an idle threat from the president, because I think that act would be so destructive to our country and to our ability to protect the national security of every American that it would be a ground for some profound effort by our part, whether it is impeachment or the 25th Amendment," Speier, a member of the House Armed Services Committee, told CNN.

"He can't do that to this country," she added. "And I don't believe he can do it without Senate ratification."

“It would be a ground for some profound effort by our part, whether it is impeachment or the 25th amendment,” Rep. @JackieSpeier says about report that President Trump discussed withdrawing the United States from NATO. https://t.co/QvLsEkG8MZ pic.twitter.com/yNijQn5VX5 — New Day (@NewDay) January 15, 2019

Speier's comments follow a report from The New York Times Monday night detailing alleged conversations between Trump and his advisers over the past year about removing the U.S. from the alliance, which reportedly came about due to Trump's belief that the alliance is sapping the U.S. of valuable resources.