The swing voters went for Obama in 2008. Now after a year of discontent, the swing voters are moving right (in large numbers).
I believe that most of the GOP leadership like most politicians will go in the direction that produces a majority that perpetuates their political careers.
Any true middle-of-the-road types will get swept out. I don't believe there is an immovable RINO-behind-the-curtain force in leadership that is willing to fight on and trick us all.
JMO.