Yeah, McCain hates Romney. In Game Change, a tell-all book (soon to be a made-for-tv movie!) about the 2008 presidential race, there's a classic scene where McCain and some other dudes running for the nomination were talking shit about Romney in the men's room at one of the debates, and then Romney walked in (and presumably went up to the urinal that was between the ones Fred Thompson and Ron Paul were at) and an awkward silence ensued.