I think the vetting we have for refugees is vastly better than the Europeans have.

We have a Muslim population which is better off economically, better engaged, and less drawn to the fight in ISIS. But as we've seen in places like California and elsewhere, we still have a threat, even if smaller.

We can't be French and Muslim at the same time. And that's exactly what ISIS wants that population to think.

We need additional funding for more U.S. combat brigades in Europe. NATO needs to continue to modernize. It is starting to show with the Russians but these exercises are central to show that the alliance is firm, especially as the E.U. starts to have some weakness on the economic front.

I think the refugee problem is Europe is vastly worse than we have in the United States.

When you do have really tapped out resources that cover so many investigations, it can help you move through and discard some faster.

We're not going to have a perfect batting average and it's important that Americans understand that.