Good move by Kaine, no matter how the conservatives want to spin it. If the debate is held the same day as the Fairfax County Chamber of Commerce debate, which seems to be the plan, it will blunt anything Kilgore has to say and make the story all about his not wanting to debate Potts. It also gives Kaine a chance to show himself as the more moderate of the three candidates.
Look for Potts to eventually endorse Kaine.