That is a most interesting idea. It at least raises questions that should be asked:
Could it be done?
Has it ever been done? (If so-how was it done?)
What about McConnell as a candidate against the democrat in the general election? (Can he win with a 30% approval rating going into it?)
For the conservative voter:
Is there any reason to vote for McConnell, in light of his open and declared hostility toward the Tea Party/what it stands for?
Only 9% turned out for the election and of those-More turned out for the democrat than for the turtle- Looks like Mitch is going to lose in November either way. Perhaps an Outside-The-Box write in campaign for Bevin could work?