In case this isn't clear, check out Cenk Uygur's post on Chuck Hagel -- if you look at his record in the Senate, what you'll see is an honest to God conservative Republican representing the state of Nebraska. You'll also see a guy who's said a lot of very tough and smart things about the Iraq War and George W. Bush's policies in the region in general. But he's not a moderate Republican by any standard; on a whole wide range of issues he's a very orthodox conservative. He doesn't seem to be a particularly enthusiastic culture warrior, but he votes with the Christian right all the time and their issues, and with business on their issues.
He's not, in short, really a Republican Joe Lieberman -- not someone with a whole array of stick-it-to-the-base notions. Outside of the foreign policy realm, there's not much to like here from a liberal point of view.