From the article:
reason: Did the New Republic talk to you before they ran it?
Paul: No, I never talked to them.
reason: What do you think of Martin Luther King?
Paul: Martin Luther King is one of my heroes because he believed in nonviolence and that's a libertarian principle. Rosa Parks is the same way. Gandhi, I admire. Because they're willing to take on the government, they were willing to take on bad laws. So I believe in civil disobedience if you understand the consequences. Martin Luther King was a great person because he did that and he changed America for the better because of that.
reason: You didn't write the derogatory things about him in the letter?