“Mueller has signaled [there may be] a report on obstruction of justice.”
I think this is why Trump has been grinning and bearing it, to the frustration of most posters here. He knows that this is a political battle, not a legal one. I think Mueller could easily write such a report, even though it would be a work of fiction. Trump does not want to hand his enemies even the appearance of impeachment grounds on a silver platter. He can’t even trust his own party to have his back in an impeachment hearing. Not sure what his end game is, but this explains Trump’s seeming inaction.
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.