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Here's the thing about ablitiy and experience. Gore's ability and experience allowed him to reform our government agencies and make them work better, some (FMEA) world class. Cheney's ability and experience allowed him to reform our government agencies and make them into political assets (competence was not required nor desired).
The job you do requires both experience, ability, and character. I think we can agree that McCain was required to eliminate what little positive character he had in order to become acceptable to GOP power brokers.