Which of the following GOP governors is most likely to be re-elected in 2014?

[Mississippi Political Freak]

Hi!  The above governors are all elected along the rust belt (maybe except Iowa) during 2010's historic GOP wave.  I'm gathering you guys' opinion on who among them will be most likely get re-elected.  IMHO, I would say Gov. Snyder is the best bet, as the measures he has proposed to bridge his state's budget gaps has been less confrontational so far, and he has projected a image as a results-oriented moderate who can act bipartisan at times (He even appointed the outgoing Democratic State House Speaker, albeit a business-friendly one, as his State Treasurer).   

Gov. Corbett is a close second bet for me, as he has been rather low-key and non confrontational so far.  The same could be said for Gov. Branstad, although he faces a major difficulty in a divided legislature; where the GOP-controlled state House is aggressively pursuing a host of red-meat measures which would almost stand no chance from the Democrat-held state Senate.

From the developments so-far, Gov. Kasich and Walker are becoming fairly unpopular after ramming through measures curbing the influences of public sector unions.  Although it's a real long way to predict their re-election prospects, I would say both are underdogs unless improvements in their states' economies give them some redemption.

What's you choice from the above list?  Opinions and discussions are always welcome!