Let's ask ourselves a couple of questions.
Have 'inferior courts' made nationwide rulings previously that have been appealed by the EXECUTIVE branch all the way to SCOTUS ?
Has SCOTUS denied the 'jurisdictional authority' of any of those 'inferior courts' (they may have denied the ruling based on other criteria - but have the denied on JURISDICTIONAL criteria ?
Why or why not have they so ruled ?
Is it because the enabling legislation does not limit the 'inferior courts' jurisdiction nationally ?
IF SO (and I believe it is so) - then only CONGRESS, with Presidential signature, has the ability and authority to change the situation.
Just a little bit to chew on, sirs.

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 ...