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WASHINGTON, DC - JANUARY 20: Former Democratic presidential nominee Hillary Clinton and former President George W. Bush greet Michele Obama and Jill Biden at the West Front of the U.S. Capitol on January 20, 2017 in Washington, DC. In today's inauguration ceremony Donald J. Trump becomes the 45th president of the United States. (Photo by Joe Raedle/Getty Images)

WASHINGTON, DC - JANUARY 20:  Former Democratic presidential nominee Hillary Clinton and former President George W. Bush greet Michele Obama and Jill Biden at the West Front of the U.S. Capitol on January 20, 2017 in Washington, DC. In today's inauguration ceremony Donald J. Trump becomes the 45th president of the United States.  (Photo by Joe Raedle/Getty Images)