‘ProPublica’ https://projects.propublica.org/represent/ makes United States Congress member votes available and has developed their own unique cartogram to visually represent this data as has ‘GovTrack’ <URL_AT_SOME_POINT> . Tools are provided to retrieve voting data, prepare voting data for plotting with ‘ggplot2’, create vote cartograms and theme them. You can grab the results of a roll call vote (House or Senate) with roll_call(). It returns a list with a ton of information that you can use outside this package. One element of that list is the data.frame of vote results. You can pass in the entire object to either _carto() function and it’ll “fortify” it before shunting it off to ggplot2. Try to cache this data (I do, below, in R markdown chunk) as you’re ticking credits off of ProPublica’s monthly free S3 allotment each call. Consider donating to them if you’re too lazy to cache the data).