Rolling over again.

The so-called blue dogs are a media invention designed to make the Democrat party appear something other than a monolithic liberal political machine.

UPDATE:
Heh. Buy the t-shirt.

Blue Dog Democrats

UPDATE II:

More on the fearsome blue dogs here.

UPDATE III:

Good observation from John McCain. Incidentally, much as there is to dislike about the guy, do you ever find yourself saying “my what a better president he would have been?”