Possibly out of ignorance but it is my understanding he was the GOPe pick. Heritage only has him at 64% and he has voted for a couple disturbing things. Coloradan Freepers seem to like him and say he is "electable" but that is usually a code word for RINO. All in all I just don't get the warm fuzzies about him.
The reason he is more electable is that Ken Buck had a lot of baggage from his last Senate run due to a spate of foot-in-mouth disease that would have been fodder for opposition ads. Ken stepped aside and is now running for Cory's seat and I think would make a fine Congressman.