It is rather simple. The GOP does not want her or the people she represents there. They believe they can get enough squishies from the middle to make up for the Religious Right and others they are driving away. They figure they either win with Romney, or can blame his defeat on the Religious Right and start the divorce proceedings.
Fine with US! We are sick of being tied to millstones anyway!
they can get enough squishies from the middle to make up for the PATRIOTS/Pro Constitution!!