If memory serves me, the primary function of the Gestapo was to keep the Nazi faithful just that, faithful and pure. Any party members who dared to waiver from the party line risked a date with some piano wire.
Now the Republicans have this 527 group known as "The Club for Growth" which apparently has appointed itself the internal polizei of the Conservative movement, dedicated to rooting out the insufficiently pure of thought. They devoted their funds to ousting Arlen Specter and tried to recruit a more intellectually pure candidate to run against John McCain.
The good news is that they have had no success in devouring Republican moderates. The bad news is that they show no signs of running out of cash and will undoubtedly keep trying.
Club for Growth
I find no shortage of examples of groups who would like to see the Republican party move even further to the right. They are cetainly not balanced out by any groups seeking to move the party back to the middle which leads me to believe that the Party is nowhere near done moving ever rightward. I think it is an interesting question to ask, just how far to the right will be too far? That is a question only Republican voters themselves can answer. Give me some help here guys, how far would be too far for those of you who voted for Bush?