Trump forgets names and rambles about a family member crossing paths with the Unabomber.

Donald Trump, 79, forgot names and falsely claimed his late uncle taught the Unabomber during a rambling speech in Pennsylvania on Tuesday.

The disturbing episode took place during a Pennsylvania “Energy and Innovation” event hosted by Republican Sen. Dave McCormick (Pa.)

Trump kicked things off by struggling to pronounce the name of his aide Michael Kratsios and seemed to have no idea who accompanied him on his trip to Pittsburgh.

“I want to introduce Dan Meuser. Dan Meuser is here,” Trump said. “Where’s Dan?”

“They all stayed in Washington,” McCormick told him.

“Oh, they’re in Washington working on our next bill? Good,” Trump answered.

In another bizarre moment, Trump claimed that his late uncle John Trump taught Unabomber Ted Kaczynski at the Massachusetts Institute of Technology (MIT).

“Kaczynski was one of his students. Do you know who Kaczynski was? There’s very little difference between a madman and a genius,” Trump said.

Trump then claimed he asked his uncle about Kaczynski, who was arrested in April 1996 after more a decade of mailing and hand‑delivering homemade bombs to academics and figures in other industries.

“I said, ‘what kind of a student was he, Uncle John, Dr. John Trump?’ He said, ‘what kind of a student? Seriously good’. He said he’d go around correcting everybody,” Trump said. “But it didn’t work out too well for him. Didn’t work out too well.”

As the Independent noted that story is not true since Kaczynski did not attend MIT.

Kaczynski earned an undergraduate degree from Harvard and his Masters and Doctoral degrees in mathematics from the University of Michigan.