A bipartisan groups of senators introduced a bill Thursday that would prevent President Trump from withdrawing the U.S. from NATO without Senate approval. A similar bill in the House is expected to follow, Foreign Policy's Robbie Gramer reports.

Why it matters: The New York Times reported Monday that President Trump told top administration officials in private conversations throughout 2018 that he wanted to pull the U.S. out of NATO. Doing so would have massive security consequences for the U.S.' European allies, and fulfill one of Russian President Vladimir Putin's long-sought goals of weakening the Western military alliance.