Lock out ALL refugees/immigrants from that entire region for one year. Then look at things again.
Anytime you have the worlds biggest terror group saying they are specifically using that avenue to get in, it's a no-brainer. I know, hilary and jeb love immigration and all... but just PAUSE it for a year and sort out the bad guys, then consider it. You don't need to end it forever, I get it. But NOW? When they're blowing up bombs with presidents in stadiums in france? No way. just lock it down.
And PLEASE jeb, stop the pandering with "only Christian refugees can come in" because every terrorist will lie. You cannot tell us how you'll tell teh difference, you just want a headline to pander to the base since you're down to 3% in polls.
Just lock it down for a year and go get the bad guys. Then re-evaluate if you must