The Governor vetoed that bill, saying it goes against the State Constitution. So, there is every possibility the Governor might ignore the bill, and appoint someone anyway, and let the courts sort it out.

Although I think it’s more likely that the Governor simply says that it’s too close to November to hold a special election. That seat is up for grabs in that election anyway, there are already candidates and everything. Beshear could just say that is also the special election, and leave the seat vacant for a few months. That would mean whoever wins that election takes the seat right away, so if Democrats pull off an upset it would have an immediate effect.