Chief Justice John Roberts, shown in 2010, is still "finding his role as chief justice," says one law professor. Paul J. Richards/AFP/Getty Images hide caption

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Massachusetts Senate candidate Elizabeth Warren is shown here attending a 2010 Capitol Hill hearing on the Troubled Asset Relief Program. Alex Wong/Getty Images hide caption

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Obama sheds tears while talking about his grandmother Madelyn Dunham, who passed away just before he won the 2008 election. Emmanuel Dunand /AFP/Getty Images hide caption

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Texas Gov. Rick Perry addressed the Veterans of Foreign Wars 112th National Conference on Aug. 29. He'll participate in his first presidential debate this week. Eric Gay/AP hide caption

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