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    Trump: Cruz is a 'maniac'

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Trump: Cruz is a 'maniac'

Republican frontrunner Donald Trump and Sen. Ted Cruz spar on Twitter just days before CNN's high-stakes Republican debate. CNN's Athena Jones reports.

Trump: Cruz is a 'maniac'

Republican frontrunner Donald Trump and Sen. Ted Cruz spar on Twitter just days before CNN's high-stakes Republican debate. CNN's Athena Jones reports.