A temporary restraining order in a non-emergency is not overstepping any authority. I see absolutely no reason why this is too important to go through due process.
There's a good point there, but I can also see the merit of letting the commander in chief get the benefit of the doubt, especially since we're not talking about U.S. citizens as far as I can tell.
No, but US citizens are affected. The US-born children of long-term non-citizen residents may lose a parent, for example, if that parent isn't let back in.
The other day, a lawyer friend of mine had to advise a client of his not to return home to visit his dying father. This client has lived in the US for 20 years, and runs a business employing six US citizens. But if he goes to visit his father, he may not be allowed back into the US. That father will die without seeing his eldest son because of this policy. But if this man has American-born children (I don't know if he does), he might be permanently separated from his children if he visits his dying father.
