Democratic and Republican candidate filings to seats up for election ratios (2018 and 2020)

Dotted lines show the 2018 trends and solid lines the 2020 trends. Hover over a point to learn more.
Each point represents one ratio of candidates-to-seats up for election for congressional filing deadlines.
Squares indicate 2018 and circles indicate 2020. The shapes are scaled based on the size of the ratio (i.e. the higher the ratio the larger the shape.)