Speaking for myself and most of my family I can say that unless the GOP runs someone in the future who is strong enough to stand up for Republican / Conservative values. . . . I will sit out the election.
Whether I vote for the Democrat or vote for someone who will give in to the Democrat the end result is exactly the same.
Instead of blaming the Tea Party or other outside forces you need to be looking in a mirror, only then will you see what is wrong with the Republican party.