Actually the difference had been with more uncommitted voters going for her. They are very worried about the economy and her plans are concrete and everyone knows she'll be in there to win for them, not just the election. Obama has two problems now, the more people know him the less some like him, motivational speaking has a shelf life and he doesn't appear to be walking the walk these days, since he's been outed as a negative campaigner, but more it's his inexperience, the throw of the dice problem, no one really knows, maybe not even him, what his policies will turn out to be.  That's why she'll win big in Democratic states where there is a large group of blue-collar workers and working moms, and there indies and pugs can't cross over.