I think we're about to find out there's a lot of asymmetry in the ability to use executive power, in that laws put some sort of ceiling (fuzzy, perhaps, but it's there) on the power of the executive branch in various areas, but there's no court-enforced floor on it, for the most part. So it's easy to, say, stop the CFPB from doing anything at all or cripple the EPA, but much harder to push those offices beyond their congressional mandate.

Restraint in this regard, and (especially) Republican willingness to let agencies, laws, and policies they don't like even sort-of work when they're in power, has essentially been due to courtesy or deference to convention. That may be going away.