You saw President Obama's toughest opponent tonight.
No, it certainly wasn't Louisiana Gov. Bobby Jindal.
It was Obama himself, and all those promises he made to the American people. About the financial stabilization funds helping them, and not funding lavish executive hijinks. And about all those billions in the stimulus bill to lay broadband cable, and invest in medical technology.
Obama 2010 and Obama 2012 will be judged on what he promised tonight. And that will be tough for anyone to measure up to.