President Woodrow Wilson meets with his first Cabinet, circa 1912. Should Cabinets have a more central role in a president's decision making? Hulton Archive/Getty Images hide caption

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Black smoke rises from the chimney of the Sistine Chapel on April 18, 2005. Black smoke signaled that the cardinals sequestered inside had failed to elect a new pope, after the death of Pope John Paul II. Alessandra Tarantino/AP hide caption

itoggle caption Alessandra Tarantino/AP