Lets see. If its a Republican President he can just follow Obama's example and say,"Well the congress isn't acting fast enough to suit me." "So, I'll just tell the IRS to stop with that income tax collecting thingy, the EPA and the Education department to pack up their desks and computers and take the rest of my term off and oh yes, all those pesky E.O.'s that the previous occupant signed, and that ACA they are all invalid." Its the precedent now. The new King has spoken.
That is what happens if this precedent is allowed to stand.