December 14, 1961 -
American author, history professor, history commentator for television news and contributing magazine editor
Author of "The Unfinished Presidency: Jimmy Carter's Journey Beyond the White House", "The Wilderness Warrior: Theodore Roosevelt and the Crusade for America" and "American Moonshot: John F. Kennedy and the Great Space Race" (for which he was on the Longlist for the Andrew Carnegie Medal for Excellence in Nonfiction in 2020)
Is the Presidential Historian for the New York Historical Society