Sure, but I think an even bigger motive for Estrich is that if Hillary is elected president, Susan could expect to receive a high government appointment. I don't know that Hillary would actually appoint her Attorney General or Solicitor General, but perhaps Deputy AG, a Court of Appeals judgeship or a US Attorney might be realistic.
And good on ya' Doug, for all you're doing.
You're right, John. It is about the presidency. Susan knows the damage this could do to Bill and to Hillary. She can't let it happen. Maybe Susan envisions being the next AG, following in the footsteps of the well-respected Janet Reno.