I wasn't there, but it don't seem to me that the moderate/conservative or social/fiscal conservative divide is enough to explain it. Kansas is a very, very red state, and those things have happened before and not caused the same result. There had to be something else going on.
Or maybe not, but it sure seems like it to me.
Some conservative groups made attacks on the personal life of Shallenberger's RINO primary opponent, then-state Attorney General Carla Stovall. She withdrew from the race, but hard feelings remained towards Shallengerger, even though he did not make the attacks. Many former Stovall backers supported Selebius.
Truse me, it is. We really have 3 political parties here, not 2.