WASHINGTON • Senator Joe Biden was spinning folksy one-liners with CBS News anchor Katie Couric the other night when he offered this pearl of wisdom about how real leaders act during times of national crisis. “When the stock market crashed (in 1929), Franklin Roosevelt got on the television and didn't just talk about the princes of greed. He said, ‘Look, here’s what happened.’ ” It was a great sound bite except for two things – Herbert Hoover, not Roosevelt, was president at the time, and commercial television didn’t exist. The good news for Biden was that hardly anyone noticed the...