Bob Somerby suggests an interesting theory of political discourse: “To survive, spin has to get stupider.”
I take this to mean that spin points must evolve with the situation in order to remain persuasive. A spin point that does not evolve may be successfully challenged with another spin point or an honest account of the facts. The evolution of a spin point must continue to bolster the original argument while continuing to obscure the facts. This “works” by keeping the spin fresh and requiring the opposition to constantly refute an ever-changing, ever-shifting set of selective facts and/or outright lies. Any political faction may practice this theory.