The problem is not that the people of Iowa are stupid. They are not, by most measurements. It’s that Iowa looks nothing like the rest of America. As a result, the winners, more often than not, are nationally unelectable extremists. Who can remember President Rick Santorum or President Mike Huckabee, both previous winners? Or President Uncommitted, who beat Jimmy Carter in 1976? And what to make of the finding that 43 percent of likely Democratic caucusgoers this year are self-described socialists, prepared to select a dyspeptic and unelectable senator as their candidate?

You’re supposed to be vetting, Iowa. You’re supposed to be culling out the crazies. You’re supposed to recognize the fraud of Ted Cruz and how Donald Trump is playing you. For all your touted small-town verities, you’re not doing your job. Your bull manure detector is broken.

It’s time to let other states have a go at it. At least we’ll hear less about corn subsidies and Corinthians II, or is it Two Corinthians? Discuss. No, don’t! Stupid, stupid people. Again, that’s Trump talking, not me. He uses that word to describe nearly everyone not named Donald J. Trump. He’s presented no governing philosophy, no policy details, nothing resembling even-keeled judgment. He’s running a combustible celebrity feud fest, and you love it.

As a bellwether, the Iowa caucuses are no more predictive than a gasbag on an ethanol high swaying from a bridge in Madison County. As a representative exercise relevant to the concerns of a nation of 322 million people, the caucuses are laughable.

Consider that half of all the babies born last year in the United States were nonwhite. Not in Iowa, of course, one of the whitest states in the nation. On Monday, if the Republican caucus is anything like the 2012 turnout, 99 percent of the attendants will be white. That’s not even the United States of 1816, let alone this year.