The GOP should not be driving the moderate wing away... they are in danger.
I tried telling that to some people in the Ffx GOP years ago. I was called a RINO. The GOP has gone off the rails. Better to let it be taken over by the clowns and let it shrink then let it have a chance to pass harmful legislation with a bigger tent.
The conservative wing that likes to refer to moderate Republicans as RINOs were much, much more successful in getting rid of moderates in 2010 than they were in 2014. I have my doubts whether those Tea-Party types are still effective in the GOP organization.