I'm still waiting for Z's answer.
It sounds to me like "the Bush's and Romney's that have actually passed real laws that have reduced our gun rights and wine and dine the Giffords' of the world" isn't the party that best represents your values. My question is this: instead of abstaining from the vote, why not show your dissent by voting for a candidate or party that actually represents your values?
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"When law and morality contradict each other, the citizen has the cruel alternative of either losing his moral sense or losing his respect for the law." -Frederic Bastiat
"I am a conservative. Quite possibly I am on the losing side; often I think so. Yet, out of a curious perversity I had rather lose with Socrates, let us say, than win with Lenin."
― Russell Kirk, Author of The Conservative Mind