Its pretty simple, really.
That's why I always laugh at the term "Conservative Democrat." There is no such thing. When push comes to shove, they vote with the party first.
If they are really conservatives, why the h*** do they belong to a political party that is communist in everything but name? To me, that shows a lack of discernment, at the very least. And don't get me started on so-called "Christians" who vote Democrat. Are you kidding me?
Never trust any politician with a D and very few with an R. There are very true in D.C. who have proven that they will go to the wall for the sake of conservative principals.