Republican Presidential candidate Donald Trump renews call to “close up our borders…until we figure out what is going on” following deadly attacks in Brussels.

DONALD TRUMP: Well, I think it’s absolutely horrible. I will tell you, I have been talking about this for a long time. And look at Brussels. Brussels was a beautiful city, a beautiful place with zero crime. And now it’s a disaster city. It’s a total disaster.

We have to be very careful in the United States. We have to be very, very vigilant. Vigilant as to who we allow into this country.

HOST: If you do become president and we’re in a situation like this, what would you do to protect America?

TRUMP: Well, again, I think I said it. I would close up our borders to people until we figure out what’s going on. Look at Brussels. Look at Paris. Look at so many cities that were great cities. Paris is almost, almost as bad if you look at…Paris is no longer the beautiful City of Lights. Paris has a lot of problems in it. All you have to do is speak to the people that live there.

And look at other places where the same thing has happened. They’re in fear. The city is in fear. We have to be smart in the United States.

And when people come in, I mean, we’re taking in, we’re taking in people without real documentation. We don’t know where they’re coming from. We don’t know what they’re, you know, we don’t know where they’re from, who they are. You look at them and look at them from any standpoint. They could be ISIS. They could be ISIS-related.

And, you know, we just don’t learn. We don’t learn. I mean, Brussels is an amazing example. Brussels was absolutely a crime-free city, one of the most beautiful cities in the world. And now you look at it. It’s a disaster.