HELEN GAHAGAN DOUGLAS AT THE DEMOCRATIC NATIONAL CONVENTION

Long accustomed as an actress to appearing before an audience, the congresswoman from California was a popular campaigner and a featured speaker at Democratic National Conventions. Her appeal, shown in this photo from the 1948 convention, sparked interest in her for higher office. The Washington Post called it the "first genuine boom in history for a woman for vice-president." © Bettmann/Corbis.