Use this for a deep dive into the demographics of a congressional district and to explore voter turnout
PolicyMap (www.policymap.com) is an online mapping application created by The Reinvestment Fund and contains over 15,000 indicators related to housing, education, mortgage originations, jobs and more. It’s fast, efficient and captures data in visually powerful ways through custom maps, tables and reports.
a searchable collection of election returns from the earliest years of American democracy. The data were compiled by Philip Lampi. The American Antiquarian Society and Tufts University Digital Collections and Archives have mounted it online for you with funding from the National Endowment for the Humanities.