They don't think they have to. True, they don't have access to the pool of unemployable volunteers that the Democrats have to go around knocking on doors, but there is an elitist attitude prevalent among the GOPe leadership that comes through not only in its lack of ground game but in its messaging, TV ads, and unwillingness to "take the low road" by going after vote fraud.
They think all they have to do is not be a crazy Communist and and the public will automatically vote for them. They forget how dumbed down that "public" really is, and that even the simplest principles of liberty need to be clearly explained and loudly trumpeted - they aren't ideas the public will have even heard before in school, as they would have in previous generations.
It wasn’t democrat foot soldiers that showed up on my doorstep, it was the candidates themselves!