Why won’t politicians take a civility pledge?

I am a conservative Republican and an evangelical Christian. I launched the Civility Project on the eve of Barack Obama’s inauguration. I asked Davis, who is a liberal Democrat and Jewish, to join me in the effort…

Incivility is not just a political problem, according to Yale law professor Stephen Carter. “Rules of civility are thus rules of morality,” Carter said, “it is morally proper to treat our fellow citizens with respect, and morally improper not to. Our crisis of incivility is part of a larger crisis of morality.”

If a moral case for civility doesn’t compel you, I’d offer a practical one: It’s more effective.

So why wouldn’t any of Wolf’s or Lieberman’s colleagues, or a single governor, pledge to be civil in their speech and behavior, and respectful of others?