This visualization maps the 2016 U.S. presidential election results at the county level, coloring each county according to the margin of victory between the Democratic and Republican candidates. The map is rendered with D3 v4 in SVG, using data from a gist by almccon that includes vote counts, percentages, and per-county party differences. A diverging color scale is applied to counties based on their per-point difference, making Democratic-leaning and Republican-leaning areas visually distinct. The choropleth highlights the geographic distribution of voting patterns across the country, from densely populated urban counties to vast rural regions, and uses a legend to communicate the margin scale.