[floor2]

This often-repeated quote is almost certainly fake.

A single person claims to have heard this statement and waited until after Mr. Ehrlichman's death, decades later, to publish the quote.

tl;dr - You're spreading misinformation because it confirms your biases

[res0nat0r]

He made that statement in this interview to Harpers in 1994: https://harpers.org/archive/2016/04/legalize-it-all/

[mikestew]

No, it is the memory of an interview for a book (which, AFAICT, was never published) back in 1994, and that memory was posted to a Harper's article in 2016 (I mean, it's right there in the URL), long after Ehrlichman was dead. As the inexplicably-downvoted GP comment says, there is no traceable basis for this quote. As far as we know, the author just made it up. The more likely case is that, at best, it is from old interview notes from 1994.