Still, why does it matter what some politicians and think tanks say? The answer is that there’s a well-developed right-wing media infrastructure in place to catapult the propaganda, as former President George W. Bush put it, to rapidly disseminate bogus analysis to a wide audience where it becomes part of what “everyone knows.” (There’s nothing comparable on the left, which has fallen far behind in the humbug race.)

And it’s a very effective process. When discussing the alleged huge expansion of government under Mr. Obama, I’ve repeatedly found that people just won’t believe me when I try to point out that it never happened. They assume that I’m lying, or somehow cherry-picking the data. After all, they’ve heard over and over again about that surge in government spending and employment, and they don’t realize that everything they’ve heard was a special delivery from the Humbug Express.