It's a tired but true cliche that every American Vice President is just a heartbeat away from the most powerful job in the world - a job they've often never really interviewed for. Who are these people? Over more than 200 years, the American voters have sent a platoon of rogues, cowards, drunks, featherweights, doddering geriatrics, bigots, and atrocious spellers to Washington D.C. to sit one bullet, cerebral...
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