I don't think there's any one definition, but to do effective political work you have to have vision and practicality, and learn how to persuade people that what you feel needs to be done does need to be done.
Alan CranstonAs they were during the Cold War, urban population centers remain the most likely targets of a nuclear attack. Now, however, an attack may come without warning from an unknown enemy, to achieve unclear motives.
Alan CranstonFear and hatred are the legacy of Ronald Reagan. America's vision of peace and freedom [is being] blasted by the guns of the U.S. Navy in Lebanon, the guns of U.S. paratroopers in Grenada, and the guns of U.S. helicopters in Honduras and El Salvador.
Alan Cranston