Trump considering changes at 'three or four or five' Cabinet positions

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10. I rather suspect he means the several people will quit on him

And he wants to be able to pretend it was his idea.

If he really wanted to change several potions after the midterms, he would have announced the moves simultaneously and branded it as a fresh start or a redirection of mission or something like that.

If he does it one at a time, without a clear indication of who or even how many upfront, it's because he doesn't have a plan, which means he's reacting not planning.