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Republican presidential hopeful Carly Fiorina looks on 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)
Republican presidential hopeful Carly Fiorina looks on 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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Carly Fiorina in debate mode

A look at the former Hewlett-Packard CEO's standout presidential debate moments so far.

Carly Fiorina in debate mode

A look at the former Hewlett-Packard CEO's standout presidential debate moments so far.