This just in: Mick Mulvaney, the “acting” White House chief of staff who’s had this job since January, might get the boot from Donald J. “Boss of the Best People” Trump.

How come? Trump is angry at Mulvaney for admitting in public that there was a “quid pro quo” with Ukraine, that Trump held up military aid in exchange for dirt on political opponents.

Mulvaney told us all to “get over it,” and said that politics inevitably gets intertwined with foreign policy.

Trump is steamed. He has floated the names of Treasury Secretary Steve Mnuchin and White House senior counselor Kellyanne Conway as possible chief of staff successors to Mulvaney.

Let’s see, that would chief of staff No. 4 for the Trump White House. Reince Priebus was replaced by John Kelly, who was replaced by Mulvaney. Now it’s Mulvaney who’s on the proverbial gurney, awaiting a form of political execution.

This is not a “fine-tuned machine” operating inside the White House.

The machine is close to exploding.