This pie chart visualizes the top 10 Democrat state populations, with each slice sized proportionally to the state's Democratic population count and colored using D3’s `scaleOrdinal` and `schemeCategory10`. The code loads data from a CSV file via `csv()`, sorts it, and renders the chart with `pie()`, `arc()`, and SVG `path` elements. A legend, built with custom `rect` and `text` elements, displays state names and population values formatted in millions.