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WASHINGTON, DC - AUGUST 23:  U.S. President Donald J. Trump arrives at the The White House on August 23, 2017 in Washington, DC. Trump returned to Washington after hosting a rally in Phoenix, Arizona, and attending a veteran's convention in Reno, Nevada. (Photo by Chris Kleponis-Pool/Getty Images)
WASHINGTON, DC - AUGUST 23:  U.S. President Donald J. Trump arrives at the The White House on August 23, 2017 in Washington, DC. Trump returned to Washington after hosting a rally in Phoenix, Arizona, and attending a veteran's convention in Reno, Nevada. (Photo by Chris Kleponis-Pool/Getty Images)

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After calls for unity, Trump launches Twitter attacks

CNN's Sara Murray reports from the White House.

After calls for unity, Trump launches Twitter attacks

CNN's Sara Murray reports from the White House.