Bob Kerrey has pitched a perfectly logical notion for the president of the United States, who has been plagued by doubters who question his assertion that “bone spurs” kept him out of military service during the Vietnam War.

Show us the medical record, Mr. President. That is the suggestion offered by Kerrey, a former Democratic U.S. senator from Nebraska. Oh, I also must point out that Kerrey is a former Navy SEAL, a Vietnam War combat veteran and a Medal of Honor recipient who lost one of his legs fighting the enemy during that horrible time.

Bone spurs don’t heal themselves, Kerrey said. You need surgery to repair them. The president has never mentioned surgery.

The bone spur issue keeps recurring because Trump keeps yapping about military matters in ways that bring these questions to the forefront.

Such as his ongoing and crass attacks against the late Sen. John McCain, the former Vietnam War prisoner who died of cancer this past August. Trump once denigrated McCain’s POW status, saying he was a “hero only because he was captured.”

Trump got several medical deferments during the Vietnam War. He has cited bone spurs. Well, just like the tax returns he keeps saying are under audit by the Internal Revenue Service, he has not provided a shred of evidence that he even had bone spurs; he also hasn’t produced a letter by the IRS declaring that it was auditing his tax returns, which he said has precluded him from releasing those returns for public review.

The president also reportedly told his former lawyer/confidant Michael Cohen that he had no intention of going to Vietnam. “Do you think I’m stupid?” Cohen said Trump asked him. Kerrey has taken offense at that notion, saying that Trump “sees all of us who went to Vietnam as fools. We were the suckers. We were the stupid ones. We were the ones that didn’t have the resources to be able to get out of the draft.”

Kerrey said this, as reported by the Huffington Post: “While John McCain was flying combat operations in Vietnam, you were, I think, falsifying that you had bone spurs in order not to go to Vietnam,” said Kerrey, a 1992 presidential candidate who retired from the Senate in 2000. “Now I know lots of people who avoided the draft, but this isn’t what he’s saying. He said ‘I physically couldn’t go,’ Well, Mr. President, get your feet X-rayed and let’s see those bone spurs. I don’t think he has them.”

Frankly, neither do I.