In my opinion, Trump's travel ban was a bit too knee-jerk...he should have excluded existing visa holders & duel residents.  But the media and the left has been even more knee-jerk in their response.  First of all, it was only a temporary ban.  But most importantly, these are 7 failed states, and are hot beds of extremism.  And to assert that we have had zero incidents from immigrants from those contries is ludicrous.  Just last November a Somali ran his car into a crowd of students a Ohio State, then jumped out and started hacking at the survivors with a machete.  I don't know all the stat's, but even a fact check site intent on debunking Trumps claims grudgingly admits that several individuals from some of the 7 banned countrieshave been convicted of supplying material support to Islamic terrorists here in the US.