I still don't see this. Why would she kill the goose that lays the golden egg? He's proven to be an absolute sock puppet. If she keeps him in place, she has an opportunity for 16 years in the Executive Branch instead of 10. Now why would she want to change that?
Greed. She wants it all. She wants to be the President. She wants it NOW.
Under my senario it would be President for life, not just in the shadows for 8 years (8 YEARS!!! that's a LONG time to be soooooo close to what you desire without being able to have it!) and the possibility of not getting elected herself when she's an old chrone.
We're dealing with EVIL, not rational thinking.
I'm serious when I refer to her as the demon possessed one...