Cognitive Dissonance.

I believe that the ability to toe the Republican Party line and proudly claim their ideals as your own is the ability to view two completely opposite perspectives as one. Cognitive dissonance is defined as the perception of incompatibility between two "cognitions", which can be defined as any element of knowledge, including attitude, emotion, belief or behavior.

Case in point, from The Hotline's Wake Up Call:

"This is probably the best message we can give to the Middle East in regards to the trouble we are having over there right now" -- Rep. Phil Gingrey (R-GA), on banning gay marriage (Washington Post)