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74% of Democrats say climate change is a serious problem and that immediate action is necessary, @NBCNews/WSJ poll finds. nbcnews.to/38WDtwC
Sen. Warren: "I'd also be the youngest woman ever inaugurated." #DemDebate nbcnews.to/36XoGQr
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He has also delivered the most attacks. nbcnews.to/38Z27wz
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