Jay Cost of National Review Online explains that the Mueller report teaches a valuable lesson about the American governing class.

[L]et’s think about part one of the Mueller report: the finding of no collusion. Nothing. Nada. Zip. Zilch. Zero. It was all a hoax — paid in part by the Hillary Clinton campaign. And yet . . . and yet! A vast concatenation of journalists, public officials, and public intellectuals have been screeching from the top of their lungs for more than two years about the dire threat to the republic. They even managed to jawbone the tech companies into restricting speech on social-media sites to combat this insidious threat.

Have they ever been more wrong?

Why yes! YES THEY HAVE!

The Russia hoax was only the latest in a long chain of grievous errors. In the past 20 years, the number of times that our civic betters have royally screwed up is astounding. They missed 9/11. They wrongly thought Saddam Hussein had chemical weapons. They didn’t see that Iraq was sliding into chaos by late 2005. They allowed Julian Assange, Chelsea Manning, and Edward Snowden to steal our secrets. They didn’t see the 2008–09 economic crisis coming until it hit them square in the jaw. They missed how a vast array of government policies and decisions contributed to it. …

… That works out to be about one massive screw-up every 20 or so months. That is insane. The array of mistakes is bipartisan, and it has been committed collectively by journalists, bureaucrats, and public intellectuals. There is one, abiding constant: The people tasked with the day-to-day management and oversight of our government have an arrogance-to-excellence ratio that is shockingly high.