Trump, 78, points out at a rally that the people in …

If Trump wins the White House in November, he would be 80 years old in the middle of his term and would likely sign many very important documents.

“There were people in their 80s asking, 'Would you sign here?'” he said mockingly to those at the rally, apparently posing as Willis or her investigators and leaning on the frail elderly.

Then he lapsed into the kind of confused speech Trump described, suddenly talking about Thomas Jefferson, Alexander Hamilton and Hillary Clinton (possibly) refusing to accept the outcome of a presidential election.

In fact, all three accepted the election results, even Clinton, who won the majority of the vote but lost the race against Trump in 2016.

Trump then added, “All these senators, like Shifty Schiff,” referring to California Democratic Senator Adam Schiff.

To underscore his own struggles with aging, Trump made another notable faux pas during his speech in Mosinee when he called Elon Musk “Leon.”

Referring to the problems with Boeing's Starliner space capsule, Trump told the crowd: “Leon is going to put a rocket in the air. He's looking forward to it; he's just thinking about things like that.”

Elon Musk's SpaceX is scheduled to launch a spacecraft in February to pick up the two American astronauts left behind on the International Space Station when Boeing's Starliner returned to Earth shortly after midnight Saturday.

After that glitch, Trump got stuck on the word “eliminate” just as he was about to boast that he would abolish the federal Department of Education and hand over in-state education to controversial Wisconsin Republican Senator Ron Johnson, who insisted that the 2021 Capitol rioters were “peaceful.”

“You know what we’re doing here,” Trump interjected, buying some time before he managed to say “eliminate” on his second attempt.

Critics on social media didn't find it funny.