Portman is no “moderate.” If you think he is, then you need to reexamine his record. He is a marked improvement over voinovich.
My dog is an improvement over V. SFW?! If Portman isn't a rino, and you think he's a viable conservative then elect him! However, if you don't really know if Portman is a rino and you vote for him then you're just exacerbating the problem.