There has been a problem so far with the present admin., and what it has allowed or presssured LE to do in respect to vetting posssible Muslim terrorists.   Fort Hood  being an example.   Every candidate is going to say they will protect the U.S. from threats foreign and domestic...what else can they say?  But given how very hard it is to vet religious extremism from immigrants without giving weight to their land of origin and cultural indoctrination, and the track record of terrorism in countries that tried to be good Samaritans, and that one candidate wants to allow thousands of immigrants from Syria, then I think there is reasonable doubt about whether this NCR columnist can so boldly assert that to be Christian and American means one must follow a very liberal immigration policy, no matter what.