From NBC's Mark Murray
One more point about Mark Penn's comment from last night: It wasn't the first time that someone from Team Clinton argued that Obama was ambivalent about how he would have voted on the 2002 war authorization vote.
Bill Clinton first raised the issue at a recent New York fundraiser, according to a New York Post article last week. "Clinton focused on the fact that three years ago - shortly after Barack Obama burst onto the world stage with his speech at the Democratic National Convention where John Kerry was nominated - Obama was asked how he would have voted on the Iraq war if he'd been in Congress at that time. 'And Obama said, "I'm not sure,"' [a participant] recalled.