Congressional seat opens up in traditional GOP district. (Thanks to White House Democrat giving Republican congressman a job.) GOP nominates relative moderate, par for the course in this district. Club For Growth and other conservative pressure groups start yapping. Third party candidate forces official Republican nominee out of the race. Safe Republican seat is won by Generic Democrat.
Variations of this story are likely to play out many times next year, especially since so many "conservatives" find all of this to be good news. Sometimes the results will be similar to this, leading to Democratic victories. In some districts they'll be very different, and some scary-ass people are going to get elected. The fact that so many citizens mete out political support based on how well the politician howls for liberal blood is both depressing and disturbing.