Daily Kos Elections is pleased to present a comprehensive look back at the 2014 election results, illustrated with a broad range of fully interactive maps and data visualizations. The above map, for instance, shows the 2014 U.S. House results by overall winning margin between Democrats and Republicans, with Democrats in blue Republicans in red. Click on a district and you will find info about the winner of each district, the 2014 election results, and the 2012 presidential results as calculated by Daily Kos Elections. The full-screen versions of this and the House maps below also have a map legend.
Aside from uncontested seats, the largest winning margins for each party were Democrat Nydia Velázquez’s 80 point win in New York’s 7th district and Republican Mac Thornberry’s 72 point win in Texas’ 13th district. Arizona’s 2nd district was the closest race of 2014, with Republican Martha McSally defeating incumbent Democrat Ron Barber by just 0.07 percent.
The interactive scatterplot below illustrates the very strong relationship between 2012 presidential and 2014 House performance. Hover over a dot and you will find the district winner and basic result stats, utilizing the two-party-only vote. Outliers to the top and left saw Democrats overperform, while those to the bottom and right saw Republicans do so.
The non-interactive version also provides a line of best fit. There’s very little variation around the best-fit line, as the two election outcomes were highly correlated. Presidential performance in 2012 was the single most informative predictor 2014 congressional outcomes.
Head below the fold to see more maps on the House as well as similar visualizations for the Senate.