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    How do Carson and Fiorina stack up in GOP race?

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How do Carson and Fiorina stack up in GOP race?

Two new candidates join the republican field battling for the White House. CNN's Dana Bash reports on Carly Fiorina and Dr. Ben Carson's announcements.

How do Carson and Fiorina stack up in GOP race?

Two new candidates join the republican field battling for the White House. CNN's Dana Bash reports on Carly Fiorina and Dr. Ben Carson's announcements.