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GOP candidates attack each other dnt murray lead _00011628
GOP candidates attack each other dnt murray lead _00011628

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    GOP candidates on the attack before Iowa caucuses

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GOP candidates on the attack before Iowa caucuses

Republican Presidential candidates are launching attacks on one another, but not the frontrunner Donald Trump. CNN's Sara Murray reports.

GOP candidates on the attack before Iowa caucuses

Republican Presidential candidates are launching attacks on one another, but not the frontrunner Donald Trump. CNN's Sara Murray reports.