The Republican party does not consist of conservatives and moderates. It consists of moderates and progressives. The conservatives in seats of power are very few, as opposed to the voter base, where conservatives are the many, the moderates and progressives are not even 50%.
The dominance of 'progressives' in the Republican establishment is fairly obvious. Unfortunately, the party has moved so far 'left' that a quasi-progressive, e.g., Gingrich, is legitimately labeled as 'conservative'. Thus the 'moderate'/'conservative' designations. However, like most FReepers, I'm well aware of the difference.