Could it be that there is a major effort from the corporate elite, including the military contractors, that is putting so much support/pressure on her, that coupled with her ego, that she is breaking? Power brokers might be really worried about the loss of power if Barak Obama wins the election.
The power brokers include the right wing, including the right wing media including Scaife and Murdock.
If this is true, Hillary is a major force to maintain the status quo.