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2. Cramer, Maria. “Besides Iowa, There are Other States with Caucuses.” The New York Times. February 13, 2020. https://www.nytimes.com/2020/02/04/us/politics/what-states-caucus.html
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4. “Electorate Profile: Iowa.” United States Census Bureau. 2014. https://www.census.gov/content/dam/Census/newsroom/releases/2016/cb16-tps09_graphic_voting_iowa.pdf.
5. Frey, William. “Just how demographically skewed are the early Democratic primary states.” The Brookings Institute. January 31, 2020. https://www.brookings.edu/blog/the-avenue/2020/01/31/just-how-demographically-skewed-are-the-early-democratic-primary-states/.