If the planned summit between Donald J. Trump and Kim Jong Un doesn’t occur as scheduled, perhaps the president can take the opportunity to escort John Bolton to the proverbial woodshed.

The president needs to talk sternly to the national security adviser.

Kim has suggested the meeting might not occur as planned. Trump said there’s a “substantial” chance it would be delayed.

Why? Well, Bolton popped off the other saying something about applying the “Libya model” to dealing with North Korea. What is that model, by the way? Well, the United States sought “regime change” in Libya; Libyans rioted and rebelled; they captured dictator Moammar Gadhafi.

Then they took the fallen despot somewhere — and then killed him. Dead! He’s a goner for keeps!

That’s the “Libya model” as espoused by the national security adviser? Trump, though, was quick to distance himself from that unfortunate example, which he did in Bolton’s presence while speaking to reporters in the White House.

No doubt Kim heard what Bolton said. He gets the implication that Bolton’s message conveyed. I mean, Trump did once refer to Kim as a “smart cookie,” isn’t that right?

There are other complications coming into play. Kim’s view of “denuclearization” of the Korean Peninsula well might differ from what Trump and the South Koreans want.

Thus, the summit might be in some immediate and hopefully temporary jeopardy.

Back to Bolton.

Trump has hired a serious hot head to be his national security adviser. Bolton is unafraid to recommend a war footing. Trump has entrusted this champion of regime change with the role of providing crucial national security advice to the commander in chief.

I just implore Bolton to lay off the “Libya model” rhetoric.