Someone wrote a letter

In the second episode of the Shrinking Trump podcast, someone suggests that this passage from a May 15 interview with Hugh Hewitt should be shared widely as evidence that Donald Trump cannot formulate ideas cognitively. You can find the passage here or here (beginning at 16:47). I made my own transcription.

Hewitt: When you became friends with Nixon in New York, did you ever talk presidential politics, how he ended up resigning, how he won so big in ’72? Did you ever discuss it with him?

Trump: His life to me was very sad. Uh, It was a very sad life. You know, uh, I got to know him, really, more when he was out. He watched me on the, his wife watched me on the, uh, on the Phil Donahue show, and she wrote a letter, which I have. She wrote a letter, which she gave to me, uh, saying that, uh, he wrote me a letter saying that my wife, Pat, who he really loved, by the way, really loved, but that, he sort of had very few friends, you know, she was his friend. But, uh, he wrote a letter, my wife Pat said that someday, if you wanted to be, you’ll be president of the United States. It’s become somewhat of a famous letter. It’s from him explaining she watched me on the Phil Donahue show. Remember that one?

Hewitt: Oh, I know the story well, and it’s absolutely true.

Trump: Yeah.

Hewitt: But let me ask you about this.

Trump: It was very cute.

And in case you lost sight of the question:

When you became friends with Nixon in New York, did you ever talk presidential politics, how he ended up resigning, how he won so big in ’72? Did you ever discuss it with him?

[My transcription.]