The main purpose of a Vice President is to be assassination insurance.
Someone who can actually run the country, but not someone you would actually want running the country.
Any of these guys could probably have done an okay job if their president had died. Ford actually did an okay job, given what he had to work with. Bush did okay in his own right when he got the job finally.
I've always felt Quayle got a bad rap, because the only time the media paid attention to him is when he gaffed. They all make Gaffes, whether it be "57 States" or "I like to be able to Fire People". THey all say dumb things. Quayle spent a lot of time on the Sunday shows, got peppered with questions and held his own most of the time.
