President Trump told NATO leaders in person and on Twitter that he wants member nations to spend 2 percent of their GDP on defense spending more quickly than the 2024 deadline agreed to in 2014, and maybe raise it to 4 percent, prompting an emergency session of NATO leaders Thursday morning. Trump also reportedly threatened to break with NATO and go it alone if other members don't raise defense spending quickly. In a news conference afterward, Trump said he believes he can withdraw the U.S. from NATO without Congress but sees no need to after the other countries, he said, made "a real commitment" to raise spending to 2 percent of GDP in a "relatively short period of years." German Chancellor Angela Merkel said the summit has been "intense."

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