In the U.S. electoral system, states decide on how they nominate candidates. Why do some states have caucuses while others have primaries?
What’s the Difference Between a Caucus and a Primary?
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Selectman Bea Varkas holds the curtain on the voting booth for Brent Stagnaro as his son Zachary, 3, follows him in, Tuesday, Jan. 10, 2012, during voting in the first-in-the-nation presidential primary, at Hilltop Middle School in Manchester, N.H. AP Photo/Matt Rourke
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