BTW, in the Trump case, as the President, it's within his powers to do so. Alan Dershowitz, Harvard law professor and Democrat, stated a President cannot be found "obstructing" for executing a Constitutionally-granted power, no matter how it may appear to outsiders. In any event, he didn't do it, and he didn't "attempt" it. If he wanted him fired, all he had to do was say his famous line and that would be that.