I expect the entrenched GOP interest to misbehave as much as any entrenched interest misbehaves.
I'm expecting a legit 3rd party challenger in 2012.
If you mean by "legit" one that will actually be a viable candidate in their own right versus drain votes off someone else and allow someone to win a "mandate" of 43 percent ala Clinton?
Hasn't really happened in 100 years (think Bull Moose Party.)