I must offer a word of caution to Beto O’Rourke’s fans who take great pride in the size of the crowds the U.S. senatorial candidate is drawing as he stumps his way across Texas.

The Democratic challenger to Sen. Ted Cruz has my vote. I want him to win in a big way. Cruz hasn’t distinguished himself as a champion for Texas causes and interests; he’s more fixated on his own ambition.

Having said that, Cruz must be considered the favorite to win re-election. Yes, polling indicates a close race. However, Texas is a Republican state. O’Rourke has to to overtake The Cruz Missile quickly and open up a bit of a spread between the two of them.

How does he do that? Well, he is drawing big crowds at rallies in rural Texas. Let me caution O’Rourke’s faithful followers: Big crowds don’t necessarily translate to a winning trajectory.

Example given: the 1972 presidential campaign of Sen. George McGovern.

I was a campus coordinator for Sen. McGovern in my native Oregon. I had returned from the Army in 1970. I was disillusioned about our Vietnam War policy. I spent some time in the war zone and came away confused and somewhat embittered.

I wanted Sen. McGovern to defeat President Nixon. He drew big crowds all across the nation as he campaigned for the presidency. They were vocal, boisterous, optimistic.

My task in college was to register new voters. We got a lot of new voters on the rolls that year. I was proud of my contribution.

On Election Night, it was over … just like that. The president was re-elected in a landslide. 520 electoral votes to 17. He won about 60 percent of the popular vote.

The big crowds, including a huge rally in the final days in downtown Portland, didn’t mean a damn thing!

Will history repeat itself in Texas in 2018? Oh, man, I hope not!