This interactive map of the United States provides a zoomable base map for exploring election data across states, counties, and congressional districts. Built with D3.js v3 and TopoJSON, it renders geographic boundaries as SVG paths, with users able to toggle between administrative levels using radio buttons. Clicking a feature triggers a smooth zoom animation into the selected region, while a home button resets the view. A tooltip displays additional context on hover. The map uses a clean white background and subtle gray fill for landmasses, with strokes emphasizing boundaries. The implementation demonstrates reusable D3 patterns and geographic projection handling.