Trump hasn't done anything yet because too many so-called 's have got their heads up their back pockets.
It would be interesting to know just what restraints, if any, may work to legally prevent a president from "modifying" "regulations" of an Executive branch department. I suspect none, unless those regs have been codified and in light of the current threats by the RINO's it doesn't sound like they have.
Nonetheless, bottom line is that it is a political battle and the pres is not at all presently well-served by his party.
That was intended to be “so-called R’s”, but after reading that article I had too many synapses firing off.