Juliette Kayyem: “It is so disconcerting that even Members of Congress don't show up that day and some even show up armed.”

You cannot fight an urban war like this without Israelis being vulnerable, especially given the intelligence setbacks that we know exist.

The big lie is direct -- directly motivates violence, because in the white supremacist viewpoint, and in these radicalized groups viewpoints, when something is stolen, they can rightfully use violence to get it back.

They are domestic terrorists, and their leader or the person they view as their leader, Donald Trump, are now not just disbanded, they can't grow.

What we need to do is police and target our resources so that we stop people from entering illegally or if they present themselves at a border crossing, ensure they never make it in if they are in fact a terror threat.