Notes

Precincts are the smallest level of geography for publicly reported election results. Many precincts have their own caucus locations, but primarily in rural areas caucuses for multiple precincts may be held at one location. In those cases, precinct results are still reported independently.

Democratic vote totals are an estimate of the number of state delegates that a candidate would receive, while Republican totals are a direct tally of caucas goers.

Credits

Additional work by Mike Bostock, Shan Carter and Tom Giratikanon

Sources

Statewide result summaries come from the Associated Press.

Iowa data comes from the Iowa secretary of state and the Iowa Democratic and Republican Parties via Microsoft.

Road shapes data by OpenStreetMap contributors.