The exception to this rule is Steven Miller. I have no idea how he does it but the guy has a rasputinesque lock on Trump.
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That's also the purpose of the mckinsey's. You got to delegate those unpopular decisions, then remove the baddies and everyone will feel good again.
I think he's just not ambitious enough to screw it up. He's perfectly happy being the sniveling henchman to the big dumb boss if it lets him do evil.