Equating DeWine with Chafee is silly. DeWine might not be Tom Coburn, but he's with us FAR more then he is against us. That cannot be said of Chafee, which is right on essentially nothing. Chafee makes Arlen Specter look like a flaming right-wing nutjob, and Specter is to the left of DeWine easily.
The one thing dewine and chafee have in common is that the wingnuts on FR hate them both and they are both more in tune with the voters in their states than the wingnuts are.