The attack has already received a fair amount of ridicule because the Janesville, Wis., plant actually closed during the last year of George W. Bush's presidency. What hasn't really been emphasized is whether Ryan clearly knew this and made the charge nonetheless.

According to a rudimentary LexisNexis search, Ryan made multiple public pleas to GM, including op-eds in his home state newspaper, to keep the plant open. He and fellow Wisconsin lawmakers went to the automobile company's headquarters to present plans to extend the plant's life. When the Bush administration itself called the decision to close the plant evidence that the auto industry was trimming fat and improving its bottom line, Ryan called the news "gut-wrenching."

And as it became clear in early-fall 2008 that GM wouldn't relent, Ryan publicly touted the federal tax money he secured to help displaced workers -- a use of funds that would seem at odds with his limited-government, fiscal conservative image.

The timeline is worth recounting now that it has popped up in Ryan's stump speech.