But a mysterious poster, known only by the handle of "Teotwawki," believes that Hillary herself drafted Sanders to run against her!
The cryptic Teotwawki theorizes:
I always suspected that Sanders was selected, possibly even by the Clintons themselves, to run as a foil against Hillary. She couldn’t go through the primaries completely unopposed. There would be no debates and no air time. But they needed someone so far left that it made even Hillary look more centrist. It just got out of hand that Sanders thought he had a serious run at the nomination.
You can read Teotwawki's post at Free Republic.