Thomas J. Ridge: “I don't think the broader global community is prepared for the magnitude of infectious diseases.”

While he may think he has the authority and legally, he might. He will not get and achieve the outcomes that I believe he wants and the President wants and the mayor wants, if you act unilaterally.

They may have a few arrests. They may have a few imprisonments. But they're not going to sustain that commitment and nothing in his plan -- I'm not even sure they have a plan.

I think [a comprehensive immigration approach] will add more to border security than any number of fences we can put across the border.

So, I think if the president is looking to make America great, that's his goal, he also has to make it safe.