Cheney said making a vice presidential decision in order to leverage key voting blocs was a mistake, saying it ignored the position's most vital duty.
"I think the single most important criteria has to be the capacity to be president," Cheney said. "That's why you pick them. I think lots of times in the past that has not been the foremost criteria."
Romney would be smart to ignore pundits handicapping the decision, Cheney said.