It is if he wins and the evangelicals and social conservative go third party or stay home. Which many will.
[IF that were true then replacing them with millions who have their heads on straight would be an enormous benefit to the GOP. When the Implacables think they can hold the party hostage to the views of a small minority most Republicans realize they are not helping the party if victory is the goal. However, I do not believe conservatives ascribe to the Cut Off My Nose to Spite My Face philosophy of the Implacables. Your threat is meaningless.]
*Smooch*