Donald J. Trump long ago disabused anyone of considering him for the title of Dean of Decorum, or the Doctor of Dignity.

He hurls insults at his foes, attaching hideous references to them. If an opponent happens to be African American, then he or she is susceptible to a racially tinted taunt. Ah, but if you’re both African American and a woman, well, all bets are off.

Get a load of how the president has referred to Omarosa Manigault Newman, the current POTUS foe du jour.

Trump referred to her in a tweet as “that dog.”

Classy, don’t you think? No need to answer that one.

According to The Hill: Critics saw the tweet as racially charged given that Manigault Newman — a former contestant on NBC’s “The Apprentice” who has just published a deeply critical book about the president — was one of the few prominent African-Americans working in the White House.

This un-presidential president continues to amaze even his harshest critics. I consider myself among the hard-liners who cannot –and will not — support Donald Trump.

He keeps reaffirming what I thought of his newly minted politician  the very moment he declared himself a candidate for the presidency.