Former President Barack Obama was spotted at the inauguration of Donald Trump. See pictures of the former president here.

Former President George W. Bush was spotted at the inauguration of Donald Trump. See pictures of the former president here.

Carter, 100, the longest-lived American president, was a little-known Georgia governor when he began his bid for the presidency ahead of the 1976 election. He went on to defeat then-President ...

American presidents hold the most powerful office on earth and occupy a unique place at the center of national and world events. At once chief executive, head of state, commander-in-chief ...