Yes, which is why legally speaking, RonPaul.com is his property. That's his trademark.
Maybe if the owner was ALSO named Ron Paul they'd have a case, but he's not.
Maybe if they were selling merchandise with the face and quotes of ANOTHER man named Ron Paul, they'd have a case, but they're not.
Ron Paul is both morally and legally justified in doing this, it'd be difficult to argue otherwise.