Of the 42 presidents, only 17 have occupied the Oval Office. Discover more about the President's Office.

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President Bush on Tuesday said, "It has been a true pleasure to work with President Calderón. He's a man of conviction, he is a man of principle, and he is a man who's willing to take on tough challenges. I appreciate every meeting I've had with him." More Videos

View these historical photographs of the presidents and first ladies in rooms of the White House

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