Don't hold your breath. SF is one of the liberal strongholds. Reps probably won't even bother to go there - unless of course they see a real chance (see Scott Brown) but they wouldn't.

Which means Pelosi is free to do anything she wants, as her own party would never restrain her (especially at the time she promotes the agenda of the President from her own party) and Reps have no real political power to oust her. Be thankful to the people of California for this gift that keeps on giving.