By my observation, the VP job is just a glorified lackey to the president. The prez assigns the VP jobs he doesn't want to jack with. The qualities needed are someone who can think & talk on the fly & take no sh*t. As for adding to the elect-ability of the prez, they need to be personable & pleasant in appearance (women good looking). As to the possibility that the VP may have to take over as POTUS, voters could care less.