Will Obama positively not go negative?

From an article of the same title by Tom Bevan in the Chicago Sun-Times:

...with Hillary Clinton leading Obama by an average of nearly 20 points in the six major polls taken so far this year, will Obama be able to close the gap over the coming year without playing hardball? And how can he attack Clinton without looking small himself and undermining the core rationale for his candidacy? I put that question to Obama's senior strategist, David Axelrod, before Obama's presidential announcement last Saturday in Springfield. "If you have a difference over an issue that's something different than a gratuitous personal attack," Axelrod said. "But the real point is the premise that if you can inspire people and if you can give them something real to believe in, you can advance your campaign without tearing everybody else down. And that is our premise and we're going to try and see if it works. If it does work, then we truly have changed our politics for the better. If it doesn't, then it doesn't. But that's the only kind of campaign that he [Obama] really can run." So, I quickly followed up, Obama won't go negative? "I . . . I . . . I don't . . . I would not say that he won't draw contrasts where contrasts should be drawn," Axelrod hedged. "But if you're asking me, do we have a strategy to tear people down? We don't. And maybe that's incredibly naive, and maybe that is not feasible in modern politics. But we believe it is, and we believe it's important to run a campaign like that."

Will he change the tone of political discourse or play hardball like all the rest? We'll see...