Rex Tillerson deserves a good word for sounding like a serious adult.

The U.S. secretary of state has declared that Americans should “sleep well at night,” even in the wake of the bellicosity coming from the North Korean dictator and the president of the United States.

What does he get from a member of Donald Trump’s national security team? Sebastian Gorka, a key member of the National Security Council, said that Tillerson is a diplomat and has no authority to talk about military matters.

There you go. A key NSC adviser tosses Tillerson under the bus. For what reason? For suggesting that the North Koreans aren’t about to launch missiles at the United States or that the United States is about to go to war with the rogue regime.

I tend to think of Tillerson as one of the grownups with whom the president has surrounded himself.

Gorka, on the other hand, provides another bullying voice for the president, as if Donald Trump needs any assistance in rattling nerves around the world. The president has done plenty of that all by himself with his “fire and fury” and “locked and loaded” rhetoric.

As for Tillerson, I’m going to presume he’s opened all the back channels he can find between Washington and Pyongyang. Perhaps he’s able to pass along to some North Korean functionary about the grave danger that can result from a foolish act of aggression.