Jimmy Carter is the only former president who has confirmed that he will be at Donald Trump’s inauguration.

Bill Clinton is considering skipping the inauguration, a source told Politico Thursday night, after he got into a bitter argument with the president-elect on Twitter.

The former president said Trump only knows “how to get angry, white men to vote for him,” while Trump said Clinton can’t win an election despite an “unlimited budget.”

[dcquiz] George W. Bush hasn’t decided if he’s attending the event either, his spokesman Freddy Ford said, and will make his decision after the new year. (RELATED: Bill Clinton Blames Hillary Clinton’s Loss On James Comey)

His father George H.W. Bush, who is 92, will not attend because of his age.

All four living presidents — George H.W. Bush, George W. Bush, Bill Clinton and Jimmy Carter — attended Barack Obama’s first inauguration in 2009. (RELATED: Donald Trump Fires Back After Bill Clinton Says He Only Appeals To ‘Angry White Men’)