{"version":"1.0","type":"rich","title":"Rate of Incumbents vs average rate over time","description":"This chart shows the percentage difference in the rate of congressional incumbents from the historical average, across sessions from 1979 to 2013. Positive values are green bars above the zero line, negative values brown bars below it, revealing alternating periods of above- and below-average incumbent rates. Built with D3 v2, it uses an ordinal x-scale for year labels and a linear y-scale for the variation, with SVG rectangles rendered by a reusable `columnChart()` function. The data comes from the 'Congress rev 01' dataset.","provider_name":"VizHub AI Studio","provider_url":"https://next.vizhub.com","html":"<iframe src=\"https://next.vizhub.com/viz/gist-2ac2de6eb9b76f1af787ba053edb52d0?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"1\"></iframe>","width":960,"height":500,"cache_age":3600}