In most cases, the finest level of geography election results are reported at is
the precinct. However, the frequency with which precincts change and the absence
in many states of strong data transparency laws can prove to be a significant
barrier in compiling election data for redistricting research. Hosted on the
GitHub organization mggg-states are the
precinct-level election geodata MGGG has compiled for its research and for the
open-source web app Districtr.