Donald Trump now says the man he selected to be attorney general, Jeff Sessions, didn’t have the mental capacity to do the job.

That’s now the president’s description of Jeff Sessions, who had the bad taste — and the good sense — to recuse himself from an investigation examining whether the Trump presidential campaign colluded with Russians who attacked our electoral system in 2016.

Sessions did the right thing and for that he now is being vilified by the president who vowed to surround himself with the “best people” were he elected to office four years ago.

Has Trump now offered an implied admission that Sessions wasn’t among the “best people”? Did The Donald due sufficient due diligence in looking for an attorney general? If not, then why not? If he did, then why has Trump changed his mind about the quality of the guy he nominated to become the nation’s top law enforcement officer?

Trump offered the criticism of Sessions in an interview with Sheryl Attkisson. “He’s not mentally qualified to be Attorney General,” Trump said. “He was the biggest problem. I mean, look Jeff Sessions put people in place that were a disaster.”

Trump now wants Sessions to lose the upcoming GOP primary runoff in Alabama for the U.S. Senate seat. He has endorsed Tommy Tuberville, the former Auburn University football coach. The winner will face Sen. Doug Jones in the fall election.

I just am astonished as I read and hear Trump talk about men and women he selects to these key jobs, who then decide to do the right thing … and then become unqualified, unfit to the job to which they were selected.

Trump’s ad hominem attacks on these individuals tell me far more about him than they ever say about the men and women he denigrates.

Among the messages I get from these attacks is that Donald Trump doesn’t know what he is doing.