Until the GOP reaches out to the "base voter" and starts to understand where they are coming from, you are going to see the erosion continue. Truthfully, the GOP should be filled with everyone BUT the "political class" who is running the show. But ask them how much effort is being made to involve more and more "ordinary folks" and you get the deer in the headlights look.
Oh sure, come election time, they will call voters, but reaching them with a message that comes from the grassroots is non-existent. The elitist fight the Tea Party as being too radical, yet their message resonates with most Liberty loving Americans. Will the GOP ever get that simplicity?