Monica Lewinsky wrote in Vanity Fair:

Just four years ago, in an essay for this magazine, I wrote the following: "Sure, my boss took advantage of me, but I will always remain firm on this point: it was a consensual relationship. Any 'abuse' came in the aftermath, when I was made a scapegoat in order to protect his powerful position." I now see how problematic it was that the two of us even got to a place where there was a question of consent. Instead, the road that led there was littered with inappropriate abuse of authority, station, and privilege. (Full stop.)

Now, at 44, I'm beginning (just beginning) to consider the implications of the power differentials that were so vast between a president and a White House intern. I'm beginning to entertain the notion that in such a circumstance the idea of consent might well be rendered moot. (Although power imbalances—and the ability to abuse them—do exist even when the sex has been consensual.)

(CNN) - Bill Clinton -- 20 years on from an affair with a White House intern that led to his impeachment by the House -- said Monday that he didn't owe Monica Lewinsky an apology.

"No, I do not," the former president responded to a question from NBC's Craig Melvin about whether he believed he should personally apologize to Lewinsky. "I have never talked to her. But I did say publicly on more than one occasion that I was sorry. That's very different. The apology was public."

Clinton is right that he offered a broad public apology for his affair with Lewinsky -- at the 1998 National Prayer Breakfast. Here's the key part of that speech:

"I don't think there's a fancy way to say that I have sinned. It is important to me that everyone who has been hurt know that the sorrow I feel is genuine -- first and most important, my family, my friends, my staff, my Cabinet, Monica Lewinsky and her family, and the American people. I have asked all for their forgiveness."