Barack Obama
A Fox News reporter asked the president about a constitutionally forbidden showdown against Obama in 2028, and Trump bit.
The president railed against an image he claims was "purposefully distorted," but was actually commissioned by his own supporters.
The role eventually went to a very different public figure.
It centered on Bush's behaviour.
The pair slammed President Joe Biden and Vice President Kamala Harris, among others, in their simulated conversation.
A two-second clip of the moment between the former presidents has been viewed tens of millions of times.
The president-elect said he "didn't realise" one thing about the exchange at Jimmy Carter's funeral until he saw footage of it.
The president-elect sat in the row directly ahead of Mike Pence, who was once the target of a violent mob bent on keeping Trump in power.
Trump damaged the Obama economy he inherited with his trade war, and now appears poised to repeat that move with the Biden economy.
Hillary and Bill Clinton also issued a statement, warning Americans what they do next will "make the difference between a nation that moves forward or one that falls back."