Fox News Sunday interviews during 2015: on War & Peace

Carly Fiorina: More than 50 boots on the ground in Syria

FIORINA: Well, first of all, it's recognition that you cannot have a successful bombing campaign without people on the ground telling you where to place the bomb. So, he's sort of come to reality. On the other hand, it's too little too late. I think this is a reflection of the reality, that when America does not act, when we do not lead as we have not the last three years under this president, our options become very constrained and the situation becomes more dangerous.I'm glad he did this, but we still do not have a strategy in Syria. We do not have a strategy to deal with ISIS.

Carly Fiorina: Rebuild missile defense program in Poland

FIORINA: Well, you know, the president has said he doesn't believe in no-fly zones, but no fly zones are very effective. They have been effective in the past and we need to establish one. We need to make it crystal clear to Vladimir Putin that our jets will fly when and where they want, that our troops cannot be threatened in any way by Russia. And it is why, as president of the United States, in addition to having a strategy in Syria and for ISIS, I would also be rebuilding the Sixth Fleet, right under Vladimir Putin's nose, rebuilding the missile defence program in Poland, so he must see strength and resolve from the United States of America.

Lindsey Graham: Need substantial boots on the ground against ISIL

GRAHAM: Here's what I've said, I intend to destroy ISIL. They want three things: they want to purify the Islamic faith and take it back to the 1100s, they want to destroy the state of Israel the attack infidels like us. President Obama said he will degrade and destroy ISIL. Sending 50 American Special Forces into Syria shows that Obama is not all in, it is a sign of weakness to ISIL. And to our allies, sending 50 troops means that we're not committed to destroying ISIL. And if we're not committed to destroying ISIL, they will attack us here. These 50 American special operators are going into a very bad spot with no chance of winning and at the end of the day, this will not destroy ISIL.

John Kasich: I'm a "cheap hawk": Cut Pentagon waste, but not spending

KASICH: I think we absolutely have to spend more on defense. It's one of the essential purposes of the federal government. But I have served on defense for 18 years and being able to witness the waste, the duplication, the red tape, the slowdown, we don't want to spend money there that goes in the bureaucracy and delay that could go into building a stronger defense. There's no inconsistency there: reform the Pentagon, strengthen the military. That's why I call myself the cheap hawk.

James Webb: Supports cutting back the army's ground commitments

WEBB: Well, we go through these cycles whenever we have extended ground commitments. We've done it three or four times in my adult life. I have a great deal of confidence, particularly in Joe Dunford, who's now going to be chairman of the Joint Chiefs. I don't think that the military leadership would be backing anything that they don't believe can work.

Q: So do you support it?

WEBB: No, I agree with the notion that ground forces are reduced when our extended ground commitments go down. But I don't know the numbers. I'd have to take a look and see where they are.

James Webb: Solution to ISIS will have to come from Sunni leadership

WEBB: The long term solution to the ISIS problem is going to have to come from the Sunni leadership in the region. In the interim period, we need to define specifically what our national security interests are and how we can bring them about. I don't think you're going to get there with us training these opposition forces in that way. It didn't work very well a few years ago before IS showed up. But in terms of our national security interests, I think you're seeing some impact.

Marco Rubio: No mistake to invade Iraq in 2003; we thought Iraq had WMDs

RUBIO: Well, not only would I have not been in favor of it, President Bush would not have been in favor of it. And he said so.

Q: So, it made sense to invade Iraq in 2003, but now you say it was a mistake?

RUBIO: That was not the same question. The question was whether it was a mistake. And my answer was it's not a mistake. I still say it was not a mistake, because the president was presented with intelligence that said Iraq had weapons of mass destruction, it was governed by a man who had committed atrocities in the past with weapons of mass destruction.

Scott Walker: Islamic terrorism like a virus; make sure it doesn't spread

WALKER: I believe we should not take any action off the table. I don't want to run into the war. But I don't want any of [our soldiers] to have died in vain. I think when we look at that and say there's radical Islamic terrorism, it's like a virus, we needed to be prepared to do what it takes to make sure it doesn't spread.

Q: You say you wouldn't take anything off the table, but that doesn't quite answer my question. Would you commit US ground forces?

WALKER: For me to do something like that would require a number of things. Listening to the chain of command, particularly the Joint Chiefs, your national security advisers and others, as to what's necessary and listening to the people who are actually out in the field is the best way to do that. But then also bring together a coalition. Certainly, reaffirming our major asset, our major ally in the region, that being Israel, but also our other allies around the world.