First of all, nothing embarrasses them. Secondly, they succeeded in casting a cloud over the administration that will never go away. Lastly, there's an old saying that "There's no defense against a liar." The Dems will continue to lie, cheat, and chip away at the administrations credibility until they reclaim the White House.
The Left's hopes and dreams receive yet another set back.
All you have to do is ask the average person what he or she thinks about the Plame "case," and you know this is true. In this day of mainstream media soundbites and downright lazy reporting, the facts mean little.
And frankly, the administration let it happen. Bad impressions stick unless you fight them early and hard.