Here's what you need to know about Washington Post columnist Dana Milbank. He's a liberal, of course, but he's a particular kind of liberal. There are different breeds, after all. Milbank is one of those who's spent way too much time in Washington and has come to mistake many of the presumptions people make in Washington for absolute fact - among them the idea that labor unions are just honest folks standing up for other honest folks, and that anyone who suggests they're a problem in any way is just a demagogue looking to use working people for target practice.