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    Critical Counties — Jefferson, Colorado: The growing suburbs

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Critical Counties — Jefferson, Colorado: The growing suburbs

CNN's John King examines the counties that he'll be keeping a close eye on on election night. Next up: Jefferson County, Colorado -- home to growing suburbs and a more diverse population.

Critical Counties — Jefferson, Colorado: The growing suburbs

CNN's John King examines the counties that he'll be keeping a close eye on on election night. Next up: Jefferson County, Colorado -- home to growing suburbs and a more diverse population.