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

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    Comments from Carson, Trump spark backlash

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Comments from Carson, Trump spark backlash

Republican presidential candidates Ben Carson and Donald Trump have made controversial comments about the idea of having a Muslim president. CNN's Dana Bash reports.

Comments from Carson, Trump spark backlash

Republican presidential candidates Ben Carson and Donald Trump have made controversial comments about the idea of having a Muslim president. CNN's Dana Bash reports.