It is clear that Obama's messaging is all over the place right now. He is spending a lot of time explaining that the economy is doing good, but not too good, but certainly not bad, etc... George Bush did not say the war on terror is going well, but not too well, but certainly not bad, and is getting better. He just came out and said we are safer now and winning the war on terror. He didn't spend a whole lot of time explaining the positives and drawbacks of the process in Iraq. He put it into a soundbite and repeated it over and over and over again.
President Obama's campaign is going to have to come up with a line that is his campaign in a nutshell. This is the line I would use, feel free to offer your own.
"We have averted the Great Depression the Republicans nearly caused. We're not going back to their policies. And if you want fairness and a better economy you're going to have to elect a Congress that doesn't stand in the way."