Donald J. Trump finally saw fit to wear a mask in public, to do the very thing his team of infectious disease experts has been imploring the public to do while the nation fights a so-far losing battle against the coronavirus pandemic.

He donned the mask while touring Walter Reed Medical Center.

If only Donald Trump had decided, oh, about three months ago to do the right thing. What might have been the result? Here’s a thought: Given the cult of personality that has developed around this clown, there well might have been less political resistance from the Trumpkin Corps against wearing the mask. As a result, there could have been thousands fewer infections and thousands fewer deaths as a result.

But oh, no! Trump wasn’t going to wear a mask. It didn’t look, um, “presidential,” or so he inferred. I guess he’s changed his mind? Is that possible? Who the hell knows?

The surgeon general pleads with us to wear a mask in public; so does the head of the Centers for Disease Control and Prevention; same for the secretary of health and human services; the top medical experts on the White House pandemic response team say the same thing.

Closer to home, we’re hearing from governors, county officials, mayors, school leaders, hospital officials, emergency responders, firefighters and cops to do the same thing.

The president? Until just this weekend he has thought differently and has brought that vocal but shrinking base of supporters along with him.

Donald Trump should be ashamed. So should those who resist the mask-wearing and the mandates to take other precautions to avoid getting swept up in the pandemic crisis.

D’oh! I almost forgot! Donald Trump has no shame.