At the end of the service, Carter’s flag-draped casket was taken by motorcade to Joint Base Andrews for the return flight aboard the modified Boeing 747 that serves as Air Force 1 back to Georgia for burial in his hometown, Plains.

Trump is obviously no fan of Biden, but Obama and his veep also have a famously complex relationship, only made more so after Obama helped nudge Biden to quit the presidential race last summer. Surely Obama feels some frustration that Biden fumbled a possibly winnable race; maybe he couldn’t help spill to his sworn enemy?

All five living presidents were in attendance at Jimmy Carter's funeral. Here's the reception Donald Trump received from other dignitaries.

Kamala Harris ignored Donald Trump at Jimmy Carter’s state funeral on Thursday, as five presidents gathered to mourn their predecessor.

The two men were seated next to each other at the National Cathedral in Washington, D.C., talking before Carter’s funeral officially started. Trump leaned in to say something to Obama, who listened before laughing and smiling as Trump continued to speak into Obama’s ear.

Thursday's service will cap off six days of remembrance for Carter, who died on Dec. 29 at the age of 100. After the funeral, Carter will return to Georgia to be buried in his hometown of Plains, next to his beloved wife of 77 years, Rosalynn Carter.

President-elect Donald Trump, who has alternated among praising, criticizing and mocking Jimmy Carter, came Wednesday to the Capitol Rotunda to pay his respects to Carter as the 39th president lies in state ahead of his funeral Thursday in the nation's capital.

Former U.S. president Jimmy Carter will continue to lie in state after his remains arrived in Washington a day earlier as part of state funeral rites

Carter will remain at the Capitol until Thursday morning, when he is transported to Washington National Cathedral for a state funeral