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Republican presidential candidate and New Jersey Gov. Chris Christie, speaks at the Growth and Opportunity Party, at the Iowa State Fair in Des Moines, Iowa, Saturday October 31, 2015.
Republican presidential candidate and New Jersey Gov. Chris Christie, speaks at the Growth and Opportunity Party, at the Iowa State Fair in Des Moines, Iowa, Saturday October 31, 2015.

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Families share stories about addiction with Christie

Republican presidential candidate Chris Christie talks to CNN's Jake Tapper.

Families share stories about addiction with Christie

Republican presidential candidate Chris Christie talks to CNN's Jake Tapper.