I honestly don't think she wants the job. There are a million things she could have done over the last 6 years to build a political profile, and she hasn't.
I think she loves the life she has right now, more or less. Lots and lots of money, fame, celebrity, and not having to do a minute's work. The moment she runs for office, it's just a massive headache, and I don't think she has that kind of lust for power.