His older brotherFred Trump, Jr., died tragicallyof alcoholism when he was just 42.

And he said, ‘Don’t smoke.’

He smoked and he drank."

Donald Trump pointing

“Never have I ever had a glass of alcohol,” he told Von.

“I do regret having put pressure on him” to join the Trump Organization, he admitted.

“It was just not his thing.

Fred

I think the mistake that we made was we assumed that everybody would like it.

That would be the biggest mistake.”

This, too, was marred by his alcoholism.

Donald Trump pointing at Barron in front of White House Melania claps

Outpatient rehab efforts failed, and in 1981, Fred died of a heart attack while hospitalized.

Donald struggled to understand why his charismatic brother couldn’t conquer his addiction.

“I used to ask, ‘Is it the taste, or what is it?'”

Trump told The Post.

The younger Trumps heard the admonitions a lot growing up, as well.

“I want all A’s,” Trump says.

“And when you get older, what are you going to remember?

No drugs, no alcohol, no cigarettes.”

Amazing Donald Trump Throwback with Barron:

“No drugs.

“One thing about us Trumps is that we have plenty of willpower.