One of the reasons Donald Trump got elected president was because he wasn’t a career politician like his opponent, Hillary Clinton.

Rather, he was a savvy businessman and a skilled negotiator who had the talent and experience to do big deals that would make America great again.

He sold that narrative with gusto and bravado, and voters bought it.

But after a rocky year on the job and another maddening week where the president spent considerable time and energy insisting he wasn’t mad (as in mad as a hatter), we have our doubts.

The week was dominated by the release of Michael Wolff’s book, “Fire and Fury,” a tell-all, insider’s account of the first six months of a chaotic and dysfunctional Trump administration where the president’s fitness for office is relentlessly questioned in interviews with his own staff.

Trump has denounced the book as “lies” and threatened to sue the publisher and the author for libel, thereby ensuring its status as a best-seller.

But the most baffling aspect of this book is why Wolff was allowed in the White House in the first place given his history of writing unflattering books on other popular figures like Trump’s pal Rupert Murdoch​?

As others have aptly noted, it was an idiotic decision that demonstrates a remarkable level of naivete on the president’s part. Why wasn’t Wolff vetted before being granted access to the White House and key staff?

Trump got suckered. Smart business people don’t get suckered.