The problem most Republicans have with using Walker’s example, is that unlike him, they don’t have any conservative principles.
Walker 2016.
Other problems with Walker include his support for amnesty, his failure to meet job creation campaign promises, and his close allignment with the GOPe (Priebus, Ryan, Romney, Rove). Also, he utterly failed to support Ted Cruz in fighting Obamacare and defending the Constitution.
Tens of thousands of Walker voters voted to reelect Obama in 2012. These same voters will surely deliver Wisconsin to Hillary or Warren if Walker is the 2016 nominee.