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Big tea party test in Mississippi

14:56

Highlights of this week’s primaries include the race between incumbent Thad Cochran and tea party challenger Chris McDaniel, the Iowa primary with Joni Ernst and California’s jungle primary. NBC’s Perry Bacon, Radio Iowa’s O. Kay Henderson, Los Angeles Times’ Seema Mehta and The Washington Post’s Dan Balz discuss with guest host Chris Cillizza to discuss.