Well, he called for the ban or moratorium just “until our representatives sort it out”.
There are several bills in congress to do so.
So if there are glaring security holes in our immigration/visa process that the congress feels need to be addressed which is better?
To close down the faulty process until it is reformed or to continue the present acknowledged dangerous process?
There are different ways to cut off immigration from the areas in question. A total ban on Muslim immigration (even temporary) is something Britain, France and other countries we have to work with could have a real problem with.