From here in heartland America, I'm winging a message eastward. It's addressed to my brothers and sisters of the mass media as they scrunch up their brows and artfully work their jaws, seeking to understand and explain what Karl Rove knew about Valerie Plame and when he knew it, assuming he knew much of anything, and whom he told, if he told anybody, and who heard, and who else knew it and why. And my message? A terse one: Just shut up, wouldja? Unfortunately, I already know the answer to such an excellent and timely question. The answer is a...