Some people are blessed with a strong immune system. Others aren't as lucky. Their defenses have been worn down by disease or injury, so they're susceptible to all kinds of infections that a healthy person would easily fight off. When that happens to someone you love, it's terrible to watch. The "body politic" works in much the same way. Our democracy has built-in defenses that keep us strong and healthy, including the checks and balances written into our Constitution. Our Founding Fathers believed that one of the most important defenses would be an informed citizenry that could make sound judgments based on facts and reason. Losing that is like losing an immune system, leaving a democracy vulnerable to all manner of attack. And a democracy, like a body, cannot stay strong through repeated injuries.
-- Hillary Rodham Clinton, What Happened, p. 325