Approval ? Review, yes. The AG works FOR the President. The President is the one that does the approving, NOT an AG - who is now fired.
BTW: The Executive Order was reviewed by the DOJ. It is not only entirely legal, it is also Constitutional. Nice to see that at least a few of the DOJ attourneys still retain their respect for the actual rule of law. A lot of the others will be gone very shortly. Jeff Sessions won't put up with the nonsense we, the people, have suffered from for the past eight years - such as non-prosecution of REAL voter intimidation because the perpetrators weren't white.
Finally, brethren, whatsoever things are true, whatsoever things are honest, whatsoever things are just, whatsoever things are pure, whatsoever things are lovely, whatsoever things are of good ...