Karma...it's a thing.  

She's unpleasant, no longer young and fresh, and has little talent otherwise.  Smiling, schmoozing, and schlepping on a morning show?  Nope.  She's just an unpleasant person trying to pretend to be nice.  No one is fooled.  She burnt her bridges behind her on the right, and never built any to the left.  Leaving her a talking head with nowhere to go.  You'd have to think, going from playing a right-wing attack dog, to playing a left-wing fluffy bunny morning show host, would have given the people writing checks pause.