CHICAGO, IL - JANUARY 10: U.S. President Barack Obama gives his farewell speech at McCormick Place on January 10, 2017 in Chicago, Illinois. Obama addressed the nation in what is expected to be his last trip outside Washington as president. President-elect Donald Trump will be sworn in as the 45th president on January 20. (Photo by Darren Hauck/Getty Images)

CHICAGO, IL - JANUARY 10: U.S. President Barack Obama gives his farewell speech at McCormick Place on January 10, 2017 in Chicago, Illinois. Obama addressed the nation in what is expected to be his last trip outside Washington as president. President-elect Donald Trump will be sworn in as the 45th president on January 20. (Photo by Darren Hauck/Getty Images)