"I have to point out that instead of telling the American people about her positive vision for America, Sen. Clinton spent an hour talking about me, and my record in a way that was flat-out wrong," he said.
"She suggested that I didn't clearly and vigorously oppose the war in Iraq, when it's absolutely clear to anybody who has followed this that I did. I stood up against the war when she was voting for it, at a time when she didn't read intelligence reports or give diplomacy a chance," he said.
Obama accused Clinton of rewriting history and trying to score political points.
"She started this campaign saying that she wanted to make history and lately and she's been spending a lot of time rewriting it. And I know that in Washington it's acceptable to say or do anything it takes to get elected, but I really don't think that's the kind of politics that's good for our party," he said. "I don't think it's good for our country and I think that the American people are going to reject it in this election."