Shortly after the election in November, President Barack Obama reminded the media and his successor that "there is only one president at a time."

On Thursday, that president will hold his last news conference at the White House, marking the end of a long farewell. Obama took part in his last foreign trip to Greece, Germany and Peru in late November. He delivered his last major speech on Tuesday before a crowd of 20,000 cheering supporters in Chicago. On Thursday, Obama awarded his last Medal of Freedom, the nation's highest civilian honor, to a surprised and touched Vice President Joe Biden.

President-elect Donald Trump held his first news conference since the election earlier in the week and batted away questions about uncorroborated allegations that Russian intelligence services had damaging information that could be used to blackmail him. Questions about Russian attempts to influence the American election and the sanctions the president imposed on Russia for its interference are likely to dominate Obama's final appearance before the press.