You remember the 1978 movie “Up In Smoke”? It was the breakthrough movie for comedians Cheech and Chong, who were always smoking marijuana in funny ways, like while driving.

Well, Tommy Chong is a big Bernie Sanders supporter. He was invited to open one of Sanders’ California rallies Monday and then he was suddenly uninvited.

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Chong told the Hollywood Reporter that he was really looking forward to standing alongside Sanders, only to be told at the last minute that, due to a sudden scheduling conflict, there was no place for him at the rally after all.

So I went back to take a look at Mr. Chong’s original YouTube endorsement to see if I could find any clues as to what may have given Sanders’ campaign second thoughts. I think what happened was that someone finally watched Mr. Chong’s endorsement video.

“So I know this year, you and I are going to feel the Bern. Go up to the polling booths and light up, man, for progress and change,” Chong says in the video.

Even though Sanders supports letting states legalize pot, he might not want video of himself standing side by side with someone who describes him as, “totally ready to be Commander in Chief, or Commander in Kush, as I like to call it.”

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Ready to be Commander in Kush — I suppose you could take that as a reference to the Hindu Kush mountains of Afghanistan, but you’d have to be smoking something.