| Campaign Finance Information Center/Investigative Reporters and Editors http://www.campaignfinance.org | |
| Campaign Finance Materials, Robert Crown Law Library, Stanford Law School http://campaignfinance.law.stanford.edu | |
| Center for Responsive Politics http://www.opensecrets.org | |
| Common Cause http://www.commoncause.org | |
| Federal Election Commission http://www.fec.gov | |
| National Institute on Money in State Politics http://www.followthemoney.org | |
| PoliticalMoneyLine.com http://www.politicalmoneyline.com or http://www.fecinfo.com | |
| The Campaign Finance Institute http://www.cfinst.org | |
| The Campaign Legal Center https://campaignlegal.org | |
| The Government Affairs Institute, Campaign Finance and Elections, Georgetown University https://gai.georgetown.edu/category/updates/campaign-finance-and-elections |
| Administration and Cost of Elections Project http://www.aceproject.org | |
| Hoover Institute, Elections Research https://www.hoover.org/research-topic/elections | |
| Department of Justice, Voting Section https://www.justice.gov/crt/voting-section |
| Ballot Access News http://www.ballot-access.org | |
| California Voter Foundation http://www.calvoter.org | |
| CalTech/MIT Voting Technology Project http://www.vote.caltech.edu | |
| Democracy Program, The Brennan Center for Justice at NYU Law School http://www.brennancenter.org/programs#democracy | |
| Electionline.org (Election Reform Information Project) https://electionline.org | |
| Fair Vote https://www.fairvote.org | |
| General Accounting Office http://www.gao.gov/new.items/d023.pdf | |
| Initiative and Referendum Institute http://www.iandrinstitute.org | |
| Public Citizen, Democracy is for People https://democracyisforpeople.org | |
| The Constitution Project https://constitutionproject.org |
| National Association of State Election Directors http://www.nased.org/members |
| Politics1.com http://www.politics1.com | |
| Project Vote Smart https://votesmart.org | |
| The Annenberg Public Policy Center of the University of Pennsylvania https://www.annenbergpublicpolicycenter.org/latest |
| Campaigns and Elections magazine https://www.campaignsandelections.com | |
| Rhodes Cook.com (Political Analysis as America Votes) http://www.rhodescook.com/ | |
| The Cook Political Report http://www.cookpolitical.com |
| Association of State Democratic Committees https://asdc.democrats.org | |
| Democratic Congressional Campaign Committee http://www.dccc.org | |
| Democratic Governors Assn. http://www.democraticgovernors.org | |
| Democratic National Committee http://www.democrats.org | |
| Democratic Senatorial Campaign Committee http://www.dscc.org | |
| Women's National Democratic Club, Committee on Public Policy http://www.democraticwoman.org | |
| Young Democrats of America https://www.yda.org |
| American Solidarity Party https://solidarity-party.org | |
| America's Party http://www.selfgovernment.us | |
| Communist Party http://www.cpusa.org | |
| Green Party http://www.gp.org | |
| Justice Party https://www.justicepartyusa.org | |
| Libertarian Party http://www.lp.org | |
| Modern Wing Party http://www.modernwhig.org | |
| Natural Law Party http://www.natural-law.org | |
| Peace and Freedom Party http://www.peaceandfreedom.org | |
| Progressive Labor Party http://www.plp.org | |
| Prohibition Party https://www.prohibitionparty.org | |
| Reform Party http://www.reformparty.org | |
| Ripon Society https://www.riponsociety.org | |
| Socialist Labor Party http://www.slp.org | |
| Socialist Party https://www.socialistpartyusa.net | |
| US Taxpayers and Constitution Party http://www.constitutionparty.com | |
| Workers World Party http://www.workers.org |
| College Republican National Committee http://www.crnc.org | |
| National Federation of Republican Women http://www.nfrw.org | |
| National Republican Congressional Committee http://www.nrcc.org | |
| National Republican Senatorial Committee http://www.nrsc.org | |
| Republican Governors Assn. http://www.rga.org | |
| Republican National Committee https://www.gop.com |
| Polling Report.com http://www.pollingreport.com | |
| The Gallup Organization http://www.gallup.com | |
| The Pew Research Center for the People and the Press http://www.people-press.org | |
| The Roper Center for Public Opinion Research, Cornell University https://ropercenter.cornell.edu |
| David Leip's Election Atlas http://www.uselectionatlas.org | |
| Federal Election Commission https://www.fec.gov | |
| Library of Congress http://www.loc.gov/minerva/collect/elec2002/index.html | |
| American National Election Studies https://electionstudies.org | |
| Office of the Clerk, US House of Representatives http://clerk.house.gov/member_info/election.aspx | |
| Record of American Democracy https://road.hmdc.harvard.edu | |
| US National Archives and Records Administration Federal Register https://www.census.gov/topics/public-sector/congressional-apportionment.html, https://www.census.gov/programs-surveys/decennial-census/about/rdo.html, https://www.census.gov/topics/public-sector/voting.html, or https://www.archives.gov/federal-register/electoral-college/about.html |
| National Conference of State Legislatures http://www.ncsl.org/research/elections-and-campaigns.aspx |
| Federal Voting Assistance Program http://www.fvap.gov | |
| Rock the Vote https://www.rockthevote.org | |
| The League of Women Voters http://www.lwv.org | |
| USA.gov https://www.usa.gov/voting | |
| Vote.org https://www.vote.org | |
| Voter Information Services http://www.vis.org |