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Trump International Hotel Washington DC stands in Washington, D.C., U.S., on Monday, March 21, 2016. 2016 Republican presidential candidate Donald Trump took his outsider campaign to the nation's capital Monday, meeting with former House Speaker Newt Gingrich and Congressional Republicans before a news conference and, later, an address to an influential pro-Israel group. Photographer: Drew Angerer/Bloomberg via Getty Images

Trump International Hotel Washington DC stands in Washington, D.C., U.S., on Monday, March 21, 2016. 2016 Republican presidential candidate Donald Trump took his outsider campaign to the nation's capital Monday, meeting with former House Speaker Newt Gingrich and Congressional Republicans before a news conference and, later, an address to an influential pro-Israel group. Photographer: Drew Angerer/Bloomberg via Getty Images