Trump also re-promoted U.S. Navy SEAL Edward Gallagher from Petty Officer First Class to Chief Petty Officer. Gallagher was convicted of a minor war crime (posing for a photo with a corpse) after he was accused of murdering the victim, but acquitted when a fellow sailor swung a deal for immunity, then reversed his testimony and claimed responsibility for the murder.
When he learned that the Navy intended to remove Gallagher from duty as a SEAL, Trump intervened again, by tweet: "The Navy will NOT be taking away Warfighter and Navy Seal Eddie Gallagher's Trident Pin."
He the had Richard Spencer fired as Secretary of the Navy for not treating the tweet as an order.
There are plenty of reasons to criticize Trump's actions, but I only have room in this column for one of those reasons: he has effectively sentenced future U.S. soldiers, sailors, airmen and Marines to battlefield execution.
Gallagher's crimes were reported by his SEAL comrades.
He was investigated and charged with those crimes by the Navy itself, which has morale and publicity incentives to only go after "the worst of the worst" for actions on the battlefield.
He was tried and convicted by a jury of his military peers in a process that actually offers more protections for defendants than the civilian justice system. For example, an enlisted defendant can demand that at least one-third of the jury be enlisted personnel rather than officers.
When Trump short-circuited that process - first with the pardon, then with the re-promotion, and finally with the demand that Gallagher be allowed to return to his former unit - he very loudly sent a message to every member of the US armed forces that when you have a bad actor in your midst, take care of the problem yourselves.
In other words, if you go through the proper channels, that bad actor will get off with little or no punishment and be sent right back to your ranks.
Above and beyond the damage done to their direct victims, war criminals endanger their fellow troops.
They make enemies out of people who might otherwise remain neutral or even friendly. They motivate those enemies to fight harder and to seek harsh vengeance.
If the military justice system doesn't charge, try, and punish people whose crimes endanger their comrades because the president panders for votes from "support the troops" types, the (unsupported) troops will deal with such matters on the spot.
We who are veterans can attest to "blanket parties" for serial screw-ups, "dry showers" with scrub brushes for guys who don't maintain personal hygiene in close living quarters, and other "light" punishments for minor offenses.
For endangering the lives of comrades, military vigilantism extends all the way to summary execution. In Vietnam, it was referred to as "fragging."
Trump isn't sparing future Eddie Gallaghers their punishments. He's just robbing them of their rightful day in court.
Thomas L. Knapp is director and senior news analyst at the William Lloyd Garrison Center for Libertarian Advocacy Journalism (thegarrisoncenter.org).