The only thing that needs to be done to stop Rinos from winning NH primaries is to close the primaries to anyone that isn't a Republican. I'm not sure why the logic was in allowing Democrats or Independents to choose the Republican candidate for President, but whatever it was it has to be seen as a failed experiment.
Well, NH should not have it however you want to look at it,
The NH Republican Party is what has failed, EPIC FAIL that is....