President Barack Obama has turned fearmongering into an art form. He has repeatedly raised the specter of another Great Depression. First, he did so to win votes in the November election. He has done so again recently to sway congressional votes for his stimulus package.

In his remarks, every gloomy statistic on the economy becomes a harbinger of doom. As he tells it, today's economy is the worst since the Great Depression. Without his Recovery and Reinvestment Act, he says, the economy will fall back into that abyss and may...