MARGARET BRENNAN: The Senate Republicans voted, the vast majority of them said that they don't support what you're doing. That what you're doing risks national intelligence by a precipitous withdrawal from Syria and Afghanistan. Doesn't that concern you?

PRESIDENT DONALD TRUMP: I ran against 17 Republicans. This was a big part of what I was saying, and I won very easily. I think the people out in the world- I think people in our country agree. We've been fighting for 19 years. Somebody said you were precipitously bringing to- precipitously? We've been there for 19 years. I want to fight. I want to win, and we want to bring our great troops back home. I've seen the people. I go to Walter Reed Hospital. I see what happens to people. I see with no legs and no arm- arms. And I've seen also what happens to them up here because they're in this situation, and they come back and they are totally different people-- where the wives and the fathers and the mothers say, "What has happened to my son? What has happened in some cases to my daughter?" It's a terrible thing. We've been there close to 19 years. And it's time. And we'll see what happens with the Taliban. They want peace. They're tired. Everybody's tired. We'd like to have- I don't like endless wars. This war. What we're doing is got to stop at some point.

MARGARET BRENNAN: But you- but you also campaigned saying that, you know, President Obama made a big mistake by telegraphing his military moves. You're telegraphing your retreat.

PRESIDENT DONALD TRUMP: I'm not telegraphing anything. No, no, no. There's a difference. When President Obama pulled out of Iraq in theory we had Iraq. In other words, we had Iraq. We never had Syria because President Obama never wanted to violate the red line in the sand. So we never had Syria. I was the one that actually violated the red line when I hit Syria with 59 Tomahawk missiles, if you remember. But President Obama chose not to do that. When he chose not to do that, he showed tremendous weakness. But we didn't have Syria whereas we had Iraq. So when he did what he did in Iraq, which was a mistake. Being in Iraq was a mistake. Okay. Being in Iraq- it was a big mistake to go- one of the greatest mistakes going into the Middle East that our country has ever made. One of the greatest mistakes that we've ever made--

MARGARET BRENNAN: But you want to keep troops there now?

PRESIDENT DONALD TRUMP: --but when it was chosen-- well, we spent a fortune on building this incredible base. We might as well keep it. And one of the reasons I want to keep it is because I want to be looking a little bit at Iran because Iran is a real problem.

MARGARET BRENNAN: Whoa, that's news. You're keeping troops in Iraq because you want to be able to strike in Iran?

PRESIDENT DONALD TRUMP: No, because I want to be able to watch Iran. All I want to do is be able to watch. We have an unbelievable and expensive military base built in Iraq. It's perfectly situated for looking at all over different parts of the troubled Middle East rather than pulling up. And this is what a lot of people don't understand. We're going to keep watching and we're going to keep seeing and if there's trouble, if somebody is looking to do nuclear weapons or other things, we're going to know it before they do.

MARGARET BRENNAN: So you're going to trust the intelligence that you receive?

PRESIDENT DONALD TRUMP: I am going to trust the intelligence that I’m putting there, but I will say this: my intelligence people, if they said in fact that Iran is a wonderful kindergarten, I disagree with them 100 percent. It is a vicious country that kills many people. When you talk about torture and so many other things. And- maybe they’ll come back. The country is getting absolutely- when I ended the horrible Iran nuclear deal- it was a horrible deal done by President Obama and John Kerry that didn’t know what the hell he was doing. When I ended that deal, Margaret, all of a sudden Iran became a different country. They became- very rapidly- right now they’re a country that’s in big financial trouble. Let’s see what happens.