Carly Fiorina, former chairman and chief executive officer of Hewlett-Packard Co. and 2016 Republican presidential candidate, speaks during the Republican presidential debate at the Ronald Reagan Presidential Library in Simi Valley, California, U.S., on Wednesday, Sept. 16, 2015. After a friendly round of introductions, the second Republican presidential debate quickly plunged into clashes that shifted from policy to the personal, with more politically experienced insiders trying to gain an advantage against the front-runner at center stage: Donald Trump. Photographer: Max Whittaker/Pool via Bloomberg