Is it wrong to call Bush a liar? (again)

Earlier, I pointed to Jack Balkin's reply to Nicholas Kristoff's piece on whether it is ok to call Bush a liar. Brad DeLong has a somewhat more passionate reply. After a long paragraph of Bush lies, he concludes with the following.

These are all lies, told by the President himself. This doesn't include any distortions, half-truths, or exaggerations, or any lies told by senior figures in the administration. These lies are big and small. Together, these lies involve trillions of dollars and at least tens of thousands of deaths, and Nicolas Kristoff is terribly concerned about sharp words and Michael Moore movies. It is indeed too bad that the "political cesspool" is becoming polarized, but I don't think that the solution to this is to shoot the messenger and agonize over ever-finer definitions of falsehood. It shouldn't be this difficult to get your priorities in order.