It was the Dowdy yellow journalist who said "Nein", not Trump

Here:

I wondered about ex-wife Ivana telling her lawyer, according to Vanity Fair, that Trump kept a book of Hitler’s speeches by his bed. Or the talk in New York that in the ’90s he was reading “Mein Kampf.” Nein, he said. “I never had the book,” he said. “I never read the book. I don’t care about the book.”