I would pick Nelson A. Rockefeller as the best vice president that should have been president in his political life. He had a very good record as governor of New York (1959-1973). He put in place the strictest drug laws, and he helped to develop New York into a modren state. As Vice President, he presided over a Presidential Commission in 1975 that was investigating the CIA and some of its covert activities. At its conclusion he said that "the CIA has engaged in a number of plainly unlawful programs". But the report was filed away and no one faced any legal consequences. He would have been a great Liberal Republican President if his Presidental campaigns in either 60, 64, or 68 suceeded. Shame he was never picked.