The map returned is exactly the same map which tract_choropleth uses. It is downloaded using the "tracts" function in the tigris package, and then it is modified for use with choroplethr.
get_tract_map(state_name, map_year, drop_geometry = TRUE)The name of the state, given by proper name, abbreviation, for FIPS code.
The year of the map you want to download.
Drop geometry data?