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.
02:24 - Source: CNN
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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.
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Republican Presidential candidate Ben Carson responds to questions from reporters upon entry to the press room at the Ronald Reagan Presidential Library in Simi Valley, California on September 16, 2015.
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Republican presidential hopeful  Ben Carson speaks during the Republican presidential debate at the Ronald Reagan Presidential Library in Simi Valley, California on September 16, 2015.  Republican presidential frontrunner Donald Trump stepped into a campaign hornet's nest as his rivals collectively turned their sights on the billionaire in the party's second debate of the 2016 presidential race.  AFP PHOTO / FREDERIC J. BROWN        (Photo credit should read FREDERIC J BROWN/AFP/Getty Images)
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