Definite 5. Krugman is an intelligent economist who has consistently written columns in favor of a national health insurance. If you have a hard time with a 5 being great and not "so far left, he's in oncoming traffic" then make another web list.

If he doesn't rate a five, nobody does and there are no liberals in America. It's too bad that by rating him at five, it registers as "Great! " I would characterize his views and arguments as "so far left, he's in oncoming traffic. "