Section 212(f) of the Immigration and Nationality Act of 1952 states: Whenever the President finds that the entry of any aliens or of any class of aliens into the United States would be detrimental to the interests of the United States, he may by proclamation, and for such period as he shall deem necessary, suspend the entry of all aliens or any class of aliens as immigrants or nonimmigrants, or impose on the entry of aliens any restrictions he may deem to be appropriate.
Protesters and those that side with them need to read the law. Also, take at Obama's action in 2011 restricting travel from the same countries. 'They're within their own PERSONAL beliefs to say it's "immoral", however, they're WRONG in saying it's unconstitutional. Therefore, I say the law is on Trump's side and the dems just need to shut up about it.