Look.  

It's a really simple matter.

Trump has no idea what he's doing day by day.

Expect more of the same.

What did not, and could not happen, was Trump being 'shrewd' and/or 'acting tactically'.

He simply reacts to whatever immediate stimulus that he encounters which distracts him from his normally constant state of dwelling upon his own greatness.

   HIs lizard brain controls all his actions.  

When Trump acts it's simply autonomous.

He's well know for agreeing with the last person that gives him any kind of input.

It's what he is.  Vacuous.