Just last night, the idiot Bill O’Reilly ridiculed Trumps various plans as being “unpractible, illegal” etc. Including his plan to temporarily halt Muslims from entering the US.
Did I mention the word “idiot”? Move over, Glennbeck....
The president can bar anyone or any class of people from entering the US. Carter ban Iranians from entering, and deported about 15,000 Iranians who were already in the US, at the time of the hostage crisis. He didn’t need congressional approval, or have to go thru the court system, just signed an executive order.