I have stated this before but the GOP is in a bind trying to appease their extreme base and appear moderate enough to attract independents.
The is a slow erosion. A lot of people have said the 2006 election got Dems in control b/c the GOP screwed up, and I agree. But '08 and right now has put Dems in a drivers seat that could affect us for a generation. If they do well for the country, they will be winning a generation or more.
By contrast, the Repubs have built a system for themselves that, if not checked, will slowly erode them out of politics.
Here is another article showing their slow demise.