It seems Nancy Pelosi's poll numbers are cratering. The explanation that we are supposed to believe is that she's not making changes.
I don't think so.
I think we got a very good look at what Pelosi and other Democrats wanted to do (quit with regards to the war on terror, particularly Iraq; massive tax increases; a bumbling foreign policy), and decided they don't like it.
EDIT: Hint to Nancy - Dishonesty and attempts to intomidate only make it worse.