“My uncle Donald is atomic crazy,” Fred said in an interview withABC News.

“And he has put his mark on the family history.”

However, the moment that had Fred nearly in tears may be the biggest revelation of all.

Fred Trump III speaking

William Trump was born in 1999 with a genetic disorder that caused both physical and mental disabilities.

William Trump had a medical fund to which Donald made frequent contributions.

Fred recalled calling his uncle when the fund was running low.

Donald Trump frowning

“A couple years ago, I called him and said ‘Donald, the fund’s running out.’

And without hesitation, he said, ‘Your son doesn’t recognize you.

His goal, he says, was to give the world, “a three-dimensional book.

It’s the good, the bad and the jaw-dropping.”

It’s already clear that he did just that.