I can't see how she can win. She is a right wing Democrat who is unlikely to pick up moderate republicans. This is because for some reason the rightwing press has absolutely and bizarrely villified her and made her into this demon. Whether its the Clinton name or something else I'm not sure. But just look at anything on freerepublic or by Fox News talking heads and they spout so much shit about how she is really an unstable, power hungry, crypto-socialist. However she has much of the party machine behind her such as the DLC (although I get the impression they have been discredited after the recent Democrat win), and the popularity of Bill who despite the whole Lewinsky scandal, left office with massive approval ratings.
Really the only reasonably decent looking candidate is
Dennis Kucinich who has absolutely no chance of winning the nomination. He was strongly against Iraq and concentrates on pushing for full healthcare and not just via ensuring everyone has insurance. This is the most obvious thing the Democrats would push for if they had any sense because the American healthcare system is an absolute disgrace and universal healthcare has always been popular, even among many in middle america and the traditionally conservative working class of the 'bible belt'.