Jonah Goldberg (at National Review's blog) likes conservatives because...well, because they're always talking about Marcus Aurelius, or Xenophon, or Aristotle...There's a caveat:
Now, of course, not every conservative kid is going to go out there and buy Meditations or Aristotle's Ethics. But the important point is that these kids understand that these works are still relevant and that a proper education includes them.
Now, we can all agree that Xenophon and Aristotle were no progressives...On the other hand, this Unitarian minister counts Marcus Aurelius as a liberal...and on the other other hand, one could argue (based on a Law and Order episode) that the Stoic emperor is objectively pro-crime...
[UPDATE: Oh, but of course there's that old saw of Aristotle's: "Of all the varieties of virtues, liberalism is the most beloved." Cited on the front page of LiberalForum.org.]