I'm gonna go on record - not that anyone cares - for my own future satisfaction and say that an increasing number of people in D.C in government know trumps days are numbered and this explains some very odd things.
He is being humoured like your aging senile relative while the nursing home arrangements are getting worked out. McConnell knows this, Rod Rosenstein was told when he threatened to resign in protest for getting abused, McMaster knows it, Deputy head of FBI knows it, CIA head knows it, etc.
Trump is down to a trusted inner circle of his daughter, his daughters wife, and his bodyguard and maybe Sessions.
While the i is dotted and the t crossed, his support erodes a little more and another ally in the press changes their mind and starts bad-mouthing him, (eg Ann Coulter)
The new head of the FBI won't be a Trump train partisan who sets about threatening everyone with huge power, and trump won't be allowed to press the nuke button or declare war on anyone.