This visualization displays a choropleth map of US states, where each state is filled with a distinct color from a categorical palette. The map uses the d3.geoAlbersUsa projection to render the geographic boundaries as SVG paths. Data is loaded from the us-atlas counties-10m.json file, with state names mapped to colors via d3.scaleOrdinal. States turn blue on hover, using CSS styling within the d3.select, d3.geoPath, and d3.json workflow.