[Editor's note: Just in time for the midterms, The Washington Post has relaunched our online politics section, including a nifty interactive map by Kat Downs (lead), Dan Keating, Karen Yourish and Nathaniel Vaughn Kelso. The map starts off on House races but also tracks Senate and Governor races. It's zoomable, panable, has a time slider for past election results. The original linework was generalized using MapShaper.org with manual adjustments to blend in detailed urban districts with more generalized rural districts, resulting in smaller file size, quicker load time, and less ambiguity on which district is which. Please email us with questions or suggestions.]
Republished from The Washington Post.
Will Republicans take control of the house in 2010? Use this map to track all 435 House races, analyse past election results, and drill down to district level data. Post reporters Dan Balz and Chris Cillizza will weigh in regularly on the 25 races you need to know about. SOURCES: Federal Election Commission, U.S. Census Bureau.
Two more screenshots, showing generalized urban area linework in the Washington, DC, metro area with thematic attribute “details” panel open and then the advanced filtering options, in this case to pull out swing districts that have rate more than 21% uninsured.