From the January 26 edition of Fox News' Hannity:
SEAN HANNITY (HOST): Waterboarding, black sites came up in your interview last night. And I was thinking, if I had an opportunity to speak with David Muir, I would say, “OK, two guys go in to your house, they kidnap your child, one guy gets away with your child, you tackle the other guy. That guy knows where your child is. Would you not waterboard that guy?”
DONALD TRUMP: So waterboarding used to be used because they said it really wasn't torture. It was the one step slightly below torture. That's why waterboarding happened.
HANNITY: That's why it was legal.
TRUMP: Torture is real torture. OK, waterboarding is, I'm sure it's not pleasant, but waterboarding was just short of torture. When all of a sudden they made it torture. So here's the story, look. I spoke with people the other day, who are in this world that we're talking about. They said, “absolutely it works.” Absolutely. Now, General Mattis said that he doesn't intend to use it. I'm with him all the way. Do I believe it works? Yes, I do.
HANNITY: We actually know it works.