What did Donald Trump do today?

He was tricked by his own chief of staff, Reince Priebus, into cancelling a meeting with the New York Times. 

According to three sources, Priebus misled Trump about the circumstances of the meeting because he was afraid that Trump was unprepared for it. 

The Times learned about the cancellation from Trump's pre-dawn tweet announcing it. The meeting was hastily rescheduled after the paper refuted Priebus' characterization.

And I should care about this why?

• Presidents should not be so easily manipulated. 

• Presidents should not appoint staff who will try to manipulate them. 

• It's a bad sign if senior White House staff feels that tricking the President is necessary.