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    Wisconsin primary critical for Donald Trump

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Wisconsin primary critical for Donald Trump

Tuesday's Wisconsin primary is the best chance for Republicans to deal Donald Trump a major loss just before the race shifts to East Coast states where he's expected to dominate. CNN's John King reports.

Wisconsin primary critical for Donald Trump

Tuesday's Wisconsin primary is the best chance for Republicans to deal Donald Trump a major loss just before the race shifts to East Coast states where he's expected to dominate. CNN's John King reports.