Walker will be doomed when the Democratic Governor of Minnesota publicly compares Minnesota's economic record since 2010 to Wisconsin's.
And Christie will likely go down in scandal.
Less people will remember Bush, so if they can get past his heresy on immigration and his last name, he might have a chance.
Jindal... Maybe. Perry was a joke last time, and his state's low unemployment rate didn't change anything. Kasich could have a good record if he could articulate it charismatically.
I look forward to President Perry then.
Perry has his own problems that make him unelectable. Walker's whole shtick is "look at how I fixed Wisconsin and saved it from the EEEEVIL unions". Plus, when you have a neighboring governor who can go around pointing out how his state is clearly doing better than Walker's without the drastic tactics Walker stooped too, it defeats the "I created jobs and fought unions" talking point. People dislike unions because they think the unions cost them jobs and comfort. If it can be proven that you can get as comfortable a recovery and more jobs as a friend to unions rather than a union-buster, then they don't have as bad a view of unions and states that like unions.
Plus Dayton could very well be a VP choice.