The dark space is one of the biggest concerns on the part of counterterrorism officials right now. Comey did a good job of explaining how they jump into a direct messaging box and then go into platforms designed specifically to be secure. There's no way, even if we have a lawful court order, to be able to access those communications.

I know there's a lot of discussion about building a 2000-mile wall. I think we need to complete the Secure Fencing Act, but we need greater technology and aviation aspects down on the Southwest border so we can see the threat from the sky. Until you can see it, you don't know where it's coming from and how to correctly stop it.

We talk a lot about operational control, and that's having a better understanding of who's coming in and who's leaving, what the threat really is. We're never really going to get that.

Michael McCaul Quotes