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    Key House races to watch in 2018

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Key House races to watch in 2018

CNN's Chris Cillizza breaks down who's safe and who should be worried as the 2018 midterms start to heat up as of January 31.

Key House races to watch in 2018

CNN's Chris Cillizza breaks down who's safe and who should be worried as the 2018 midterms start to heat up as of January 31.