"Nelson Rockefeller, I am certain, would have made a great President. He possessed in abundance the qualities of courage and vision that are the touchstones of leadership. But at the moments when his goal might have been realized, in 1960 and again in 1968, he uncharacteristically hesitated. In the service of his beliefs he could be cold-blooded and ruthless; he was incredibly persistent. Yet there was in him a profound ambivalence."