It's not easy to join the President's Club, but once you do, only few can understand the effect it has on you.
That might explain why former presidents have a bond that seems to transcend politics.
From formal events, to galas, fundraisers, and funerals — presidents stay within the same circle and see each other throughout the course of their lives.
In honor of President's Day, we've rounded up the best photos of former US presidents enjoying each other's company.
SEE ALSO: What Donald Trump and other US presidents looked like when they were young
Former Presidents Barack Obama, Bill Clinton, George W. Bush, George H.W. Bush, and Jimmy Carter joined each other on stage at the opening of a hurricanes relief concert in College Station, Texas, in October, 2017.
Obama, Bush and Clinton posed during the first round foursomes match of The President's Cup golf tournament at Liberty National Golf Course in New Jersey in September, 2017.
Bill Clinton and George W. Bush shared a moment after Bush gave Clinton advice on how to be a grandfather, during an onstage conversation at a Presidential Leadership Scholars event at the Newseum in Washington, September of 2014.
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