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GOP debate look ahead sunlen serfaty newsroom_00001725
GOP debate look ahead sunlen serfaty newsroom_00001725

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    GOP rivalries to take center stage in debate

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GOP rivalries to take center stage in debate

As Republican candidates prepare to debate, party rivalries remain strong. CNN's Sunlen Serfaty reports.

GOP rivalries to take center stage in debate

As Republican candidates prepare to debate, party rivalries remain strong. CNN's Sunlen Serfaty reports.