The end result [of Elizabeth Edwards pushing her husband to make a comprehensive and universal health-care reform plan the centerpiece of his second presidential campaign] was that the three candidates ended up fighting over who would do more to pass a universal health-care bill the fastest, which meant they made repeated promises that, in Obama’s case, he eventually found himself having to keep. Without Elizabeth Edwards’s involvement, the Edwards campaign would likely have come out with a more modest effort, and the Obama and Clinton campaigns would have taken a similarly incremental approach, and none of the campaigns would have made as many promises on the subject as they did, and health-care reform might never have passed.
The Edwards campaign really had an outsize impact on the de facto Democratic platform as a whole, “progressivizing” it much more than Kucinich ever did; presumably because Edderds was seen as a very serious candidate, at least in the early going, and had to be responded to, in detail, in a way that Kucinich just never did.
The old “remarkable woman behind a deeply flawed candidate”…in another era, John would have been the Billy Carter dragging on her campaign.