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WASHINGTON, DC - JUNE 14:  U.S. President Donald Trump leaves after delivering brief remarks in the Diplomatic Room following a shooting that injured a member of Congress and law enforcement officers at the White House June 14, 2017 in Washington, DC. Trump announced that the suspected gunman, 66-year-old James T. Hodgkinson of Belleville, Illinois, was killed in the attack. (Photo by Chip Somodevilla/Getty Images)
WASHINGTON, DC - JUNE 14:  U.S. President Donald Trump leaves after delivering brief remarks in the Diplomatic Room following a shooting that injured a member of Congress and law enforcement officers at the White House June 14, 2017 in Washington, DC. Trump announced that the suspected gunman, 66-year-old James T. Hodgkinson of Belleville, Illinois, was killed in the attack. (Photo by Chip Somodevilla/Getty Images)

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Historian: Cloud over Trump isn't lifting

Presidential historian Douglas Brinkley comments on The Washington Post's report that special counsel Robert Mueller is investigating President Donald Trump for obstruction of justice.

Historian: Cloud over Trump isn't lifting

Presidential historian Douglas Brinkley comments on The Washington Post's report that special counsel Robert Mueller is investigating President Donald Trump for obstruction of justice.