Donald John Trump pledged to become an “unconventional” president after he was elected to the office.

Of the promises he has kept, this is the one he has upheld in spades.

The president has just “blindsided” Secretary of State Mike Pompeo, to cite just the latest example of his unconventional approach to international diplomacy. He uses Twitter to make statements on his own. Trump believes the presidency entitles him to do so. I guess it does, but there’s considerable peril in this practice.

Trump tweeted a message threatening punishment for Turkey if that nation doesn’t release an American who has been held captive for several years. Pompeo has been negotiating for this American’s release and — surprise! — he had no idea the tweet from Trump was coming.

This is how Trump governs. He surrounds himself with “the best people” and then stiffs them whenever he fires off a Twitter message without their knowledge.

He doesn’t bother to tell his national security team when he gets a bur under his saddle and threatens to destroy regimes in, say, North Korea or Iran. He invited Russian President Vladmir Putin to Washington, had his national security adviser put the word out and he never told Director of National Intelligence Dan Coats.

Trump flies by the seat of his pants. He keeps his own counsel. He relies on no one, yet he brings these “brilliant minds” on board ostensibly to provide him with advice.

Unconventional? Yeah, do you think?

It’s also dangerous, reckless, feckless and mindless.

This man with no public service experience is leaving wreckage all along every path he travels. He has brought some good people on board, but he ignores them repeatedly.

This “unconventional” presidency of Donald Trump’s well could get us all into a heap of trouble.