McGovern is not the only one. Consider one of my political heroes, George Mitchell: federal judge, Democratic senator, and a special envoy to both the Middle East and Northern Ireland, in addition to many roles in the private sector. Or, from the other side of the aisle, George H.W. Bush: war hero, representative, ambassador, CIA director, vice president, president, and international aid activist. They were, or are, great men and some of the best leaders our country has known. When their country called, they and many others, like Bob Dole and Daniel Moynihan, stood up and volunteered.