On the Democratic candidates and the credibility gap

"Having learned from 2008, she's got the best ground operation in the history of Iowa caucuses that still may rescue her there. But she's sinking rapidly against a 73-year-old political maverick who is still just introducing himself to the American people."

The question is: Why is that so?

The rest of the story:
As Panic Grips Clinton Campaign, The Real Question: What's Wrong with Hillary? by Robert Borosage (Common Dreams)