ABC This Week interviews during 2015: on Homeland Security

Ben Carson: Doesn't want ISIS to know if he condones torture or not

CARSON: I agree that there's no such thing as political correctness when you're fighting an enemy who wants to destroy you and everything that you have anything to do with. And I'm not one who is real big on telling the enemy what we're going to do and what we're not going to do.

Q: But you would do that even though many consider waterboarding torture?

CARSON: As I said, I'm not real big on telling them what we would or would not do.

Ben Carson: Beef up intelligence gathering, including in mosques

CARSON: Well, I said in the larger capacity that we should monitor anything -- mosques, church, school, you know, shopping center where there is a lot of radicalization going on.

Q But how would you know that is happening?

CARSON: Intelligence. We have intelligence on the ground already. We do need to enhance that. For instance, we've learned last week that the FBI seems to be only to be able to monitor 30 to 60 people at a time. And we know there's a lot more than that that needs to be monitored. We need to get very serious about our intelligence.

Ben Carson: Keep 2nd amendment rights for people on terror watchlist

CARSON: Well, as you, I'm sure, know, there are a lot of people on that watchlist and they have no idea why they're on that list and they've been trying to get their names off of it and no one will give them information. You know, I am a big supporter of the Second Amendment, and I don't want to deprive people unnecessarily of that. There needs to be better due process. And that's one thing that I'm very interested in finding a way to make government more responsive to the people. It's really unfair that people can't get a real hearing. And they get put on a list and nobody can tell them why they're there, and they go through for years and years and they have to be tormented. It just doesn't make any sense.

Donald Trump: Bring back waterboarding and other interrogation methods

TRUMP: Well, we have to be strong. You know, they don't use waterboarding over there; they use chopping off people's heads. They use drowning people. I don't know if you've seen with the cages, where they put people in cages and they drown them in the ocean and they lift out the cage. And we're talking about waterboarding. I would bring it back, yes. I think waterboarding is peanuts compared to what they'd do to us, what they're doing to us, what they did to James Foley when they chopped off his head. That's a whole different level and I would absolutely bring back interrogation and strong interrogation.

Donald Trump: Surveil mosques but don't close mosques

TRUMP: Well, I don't want to close mosques; I want mosques surveilled. And all I would do, certainly there are certain hot spots and everybody knows they're hot spots. Good material was coming out of those mosques. We were learning a lot. And they were stopping problems and potential problems by learning what was happening. I don't want to close up mosques but things have to happen where, you have got to use strong measures or you're going to see buildings coming down all over New York City and elsewhere.

Donald Trump: New Jersey Muslims cheered on 9/11

TRUMP: It did happen. I saw it. It was on television. There were people that were cheering on the other side of New Jersey, where you have large Arab populations. They were cheering as the World Trade Center came down. I know it might be not politically correct for you to talk about it, but there were people cheering as those buildings came down. It was well covered at the time.

Ben Carson: Religion not sufficient probable cause to track

CARSON: I personally don't feel that way, but I would certainly be willing to listen to somebody who had evidence to the contrary. I think that's one of the problems, we get to our little corners and we don't want to listen to anybody anymore.

Bobby Jindal: Hillary should not be above the law in her email scandal

Donald Trump: Enhanced interrogation a non-issue, compared to terrorism

TRUMP: I would be inclined to be very strong, because I have no doubt that that works. I have absolutely no doubt. Waterboarding used to be such a big controversial subject, and I haven't heard that term in a year now. Because when you see the other side chopping off heads, waterboarding doesn't sound very severe.