Donald Trump is completely unfit to be president of the United States.

That is not an ideological expression. That is an expression of the shock of mounting evidence that he is intellectually deficient, temperamentally unsound and morally bankrupt.

Just this week, he has once again underscored the degree to which he is openly hostile to people of color — I call that racism and bigotry — and demonstrated his lack of impulse control to conceal his contempt even when doing so would be to his benefit.

On Monday, Trump defiled a White House ceremony to honor Navajo veterans of World War II (a meeting already defiled because it was held before a portrait of Andrew “Trail of Tears” Jackson) by using a racial slur, pejoratively referring to Senator Elizabeth Warren as “Pocahontas.”

These men deserved better, and if Trump were thinking more about them and less about himself — as almost any other American president would have been — he wouldn’t have dragged their moment down into his muck. But this is what happens when you “let Trump be Trump”: He shows up as the bestial creature that he is.