Unless Congress impeaches him he would rip this country apart fighting that shyt. The only way they get him to resign is Congress put that pressure on him Even one house would be enough really. The State charges could work, but would be so fukking bloody, Mueller is keeping it as a deadman's switch to keep Trump from firing him so he can try to do this the right way, on the federal level. Hell even if he could get Trump on state charges that sets a dangerous precedent for future presidents as well.
If the republicans keep both houses in 2019 we are screwed....... shyt I expect them to pass every evil bill possible on the way out too like making abortion illegal and a whole bunch of other stuff