Prince Reibus is the RNC chair. He used to be the Wisconsin GOP Chair. The state GOP is all RINO. They battled the TEA Party throughout the 2010 campaign, always throwing their support to the establishment candidate and ignoring the TEA Party choices. I have no problem believing that that the RNC skewed its support to Romney.
I have heard a lot, a real lot, of anecdotal stuff, and a lot of it I dismissed because the people were just strong Newt supporters and easily upset, but that was a while ago, and I've since changed my mind. the Florida GOP moved heaven and earth to get at Newt, and I believe crossed the line a few times. Then Tennessee... and I am sure they have done similar stuff to Santorum, though don't know those details. Mainly, if half the stuff I have heard is halfway accurate, the RNC is almost criminal, and totally unethical.