The nominations of senators McCain and Obama will renew one surprising trend: for the fifth time in the last 35 years, America will have a lefty in the White House. Since 1974, presidents Ford, Reagan, George H.W. Bush, and Clinton have all favored their left hands, while President Carter and the current President Bush are righties.
Studies have shown that whereas righties favor the left hemisphere of their brain, which controls language, left-handers are more likely to have bilateral brain function, which could allow them to visualize problems more broadly and with more complexity.
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