Dem rep: Trump pulling US from NATO would be grounds for impeachment

A Democratic member of the House warned Tuesday that any move by President TrumpDonald John TrumpEsper sidesteps question on whether he aligns more with Mattis or Trump Warren embraces Thiel label: 'Good' As tensions escalate, US must intensify pressure on Iran and the IAEA MORE to exit NATO would be grounds for removal from office.

Rep. Jackie SpeierKaren (Jackie) Lorraine Jacqueline SpeierIt's time for the left to advance a shared vision of national security: Start by passing the NDAA Overnight Defense: Woman accusing general of sexual assault willing to testify | Joint Chiefs pick warns against early Afghan withdrawal | Tensions rise after Iran tries to block British tanker House approves amendment to reverse transgender military ban 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."

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.