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Republican presidential hopefuls  Ben Carson and Donald Trump participate in the debate at the Ronald Reagan Presidential Library in Simi Valley, California, on September 16, 2015.
Republican presidential hopefuls  Ben Carson and Donald Trump participate in the debate at the Ronald Reagan Presidential Library in Simi Valley, California, on September 16, 2015.

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    Poll: Trump, Carson break away from pack

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Poll: Trump, Carson break away from pack

Donald Trump and Ben Carson now stand alone at the top of the GOP field, as Carly Fiorina's brief foray into the top tier of candidates appears to have ended.

Poll: Trump, Carson break away from pack

Donald Trump and Ben Carson now stand alone at the top of the GOP field, as Carly Fiorina's brief foray into the top tier of candidates appears to have ended.