Answer:
One reason Iowa draws so much attention in a presidential campaign year is because the Iowa caucus is unlike any other.
Explanation:
The Democratic and GOP caucus systems in Iowa are different. In the Democratic caucus system, registered voters don't just go to their designated polling place and, well, vote. Instead, they attend public meetings, usually held in school gyms, churches and public libraries, and even restaurants and fire stations, to choose their presidential nominee by standing in a section of the room devoted to their candidate.
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https://people.howstuffworks.com/iowa-caucus.htm
