President Donald Trump warned NATO allies on Thursday that if they don't pay up, the U.S. won't come to their defense if they're attacked. The president, since his first term, has pushed for ...

President Donald Trump's pick for NATO ambassador promised senators the United States’ commitment to NATO will be “ironclad,” even as questions continue to circle about Trump’s approach to dealing ...

President Trump on Thursday suggested the United States may not defend NATO allies that have not contributed enough to defense spending, casting doubt on a core aspect of the alliance.