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Republican Presidential hopeful Marco Rubio smiles after the CNBC Republican Presidential Debate, October 28, 2015 at the Coors Event Center at the University of Colorado in Boulder, Colorado.
Republican Presidential hopeful Marco Rubio smiles after the CNBC Republican Presidential Debate, October 28, 2015 at the Coors Event Center at the University of Colorado in Boulder, Colorado.

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    Could debate performance lift Rubio to top the polls?

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Could debate performance lift Rubio to top the polls?

Marco Rubio, Ted Cruz and other candidates helped steal the spotlight from front-runners at the CNBC GOP debate. CNN's Sunlen Serfaty reports.

Could debate performance lift Rubio to top the polls?

Marco Rubio, Ted Cruz and other candidates helped steal the spotlight from front-runners at the CNBC GOP debate. CNN's Sunlen Serfaty reports.