WCS... A useless (and very political) effort indeed! All the "fact checkers" agree. No one from the banned countries has committed a terrorist act on American soil. Not so of course with other countries that are not on the list, eg. Saudi Arabia. The named countries are low-hanging fruit; he can anger and alienate them with relatively few consequences, in the Administration's view, for the U.S. Not so with the region's big players - Saudi Arabia, Pakistan and others; we can't anger them. Why is he doing this as you ask? Because he is taking an easy, highly visible action that his uninformed base will love - "Trump's doing what he said he would do". Ignorant white nationalists must feel like they've died and gone to heaven. Another great example of "Ready, Fire...Aim. Is there any adult supervision in the White House these days?