There is a sly, deceitful nastiness in the words and actions of McCain and Romney that I never saw in the three you mentioned. All were RINOs, but McCain and Romney were RINOs with axes to grind. Politically they were not worse than the other three, but psychologically they were. The psychological angle cannot be discounted. When you put a person with pathological emotional issues into a position of unique power, the emotional issues worsen just like clockwork.