So now we know what Team Obama's comeback plan was following last week's defeat in the Presidential debate. Unleash Joe Biden to interrupt, filibuster, snarl, smirk and otherwise show contempt for Paul Ryan. The carnival act contributed to the least illuminating presidential or vice presidential debate of our lifetimes.

From the opening bell, Mr. Biden seemed to take to heart the interpretation that President Obama offered this week of his debate performance—that he had been "too polite." That was not a problem for the Veep,...