This column enjoys challenging conventional media wisdom but must credit the media herd for being right about Michael Bloomberg. He wasn’t ready for Wednesday’s debate. Still, after a brutal beginning the former New York City mayor added value by joining with Pete Buttigieg to expose flaws in the ideology and credibility of frontrunner Bernie Sanders.

Before the debate your humble correspondent suspected that Mr. Bloomberg would be more Iron Mike than Mini Mike in his debut on the Presidential debate stage. But in true Vegas...