{"version":"1.0","type":"rich","title":"USA 2012 presidential election proportional circles (d3v3)","description":"This block visualizes the 2012 U.S. presidential election results by county, using proportional circles overlaid on a map of the United States. The map is rendered with SVG using D3v3, with each county’s circle sized according to total votes cast and colored to indicate whether Obama or Romney won the county, based on the percentage margin. The underlying geometry is loaded from a TopoJSON file containing county-level election data, and the proportional circles provide a quick visual comparison of vote totals and partisan leanings across the country. The visualization is built with Blockbuilder.org, is available under the MIT license, and is a fork of earlier iterations that evolved from bar symbols to proportional circles.","provider_name":"VizHub AI Studio","provider_url":"https://next.vizhub.com","html":"<iframe src=\"https://next.vizhub.com/viz/gist-7fd75a9d720a8b95b46fcd11a3542fa2?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"1\"></iframe>","width":960,"height":500,"cache_age":3600}