It is fair to wonder about the depths of Donald J. Trump’s progression as a politician. To the point: Just how low is too low and how do we know if he has hit rock bottom?

I do not believe, based on the record of low points he has acquired to date, that we have found the bottom of the abyss.

My goodness, this individual has scored so many low points it’s hard to keep score. Some highlights/lowlights:

• He said the late U.S. Sen. John McCain was a “war hero only because he was captured” during the Vietnam War.
• Trump denigrated a Gold Star family because of their Arab ethnicity; their son, an Army officer, died in battle in Iraq. The parents had the temerity to criticize Trump during the Democratic National Convention in 2016.
• Trump mocked a New York Times reporter, mimicking his actions caused by a severe neuromuscular disease.
• The candidate admitted to a TV host that he grabbed women by their genitals because of his “celebrity” status.
• Trump has lied repeatedly, gratuitously and without any sense of shame.
• The president just recently criticized the Special Operations Command chief — retired Admiral William McRaven, a battle-tested SEAL — for failing to kill Osama bin Laden “much sooner” than commandos did.

I know I have missed some examples, but you get the idea.

One might surmise, probably correctly, that any one or two of those incidents would doom someone’s political aspirations. Donald Trump, though, not only has survived, he has managed to fire up his political base. The roughly 38 percent of Americans who stand by their man do so because he “tells it like it is,” or he sticks it in the establishment’s eye, or speaks their language.

What’s more, this guy doesn’t care that the rest of the country finds his statements, behavior and demeanor repugnant to the high office he occupies.

How low can this guy go? I think he’s got some more space to fall before he finds the bottom of the pit.

He once said he could “shoot someone on Fifth Avenue and not lose any votes.” I believe he is correct. Surely he knows better than to test that theory. Doesn’t he?