This choropleth map displays the municipalities of São Paulo, Brazil, colored by political party affiliation. The geographic boundaries are rendered as SVG paths using D3.js version 7, with each region’s `data-party` attribute determining its fill color. The visualization uses D3’s selection API to attach mouseover event listeners to all geographic elements, triggering a lookup in the imported `SP` dataset to log the corresponding municipality details. The map includes zoom and pan capabilities through a transformable group, and the styling applies white strokes between regions for clear separation.