Campaign Finance

• Federal Election Commission
• Open Secrets
• CRP Anomaly Tracker
• Party Time (fundraising events)
  
• Institute for Free Speech
• Political Moneyline
• IRS information on political organizations
• California campaign finance data
• Database on Ideology, Money in Politics, and Elections (DIME)

Election Results, Statistics, & Studies

• Census data on voting & registration
• National Archives Electoral College Page
• American Presidency Project
  
• US Presidential Election Atlas
• 270towin.com
• United States Election Project (turnout)
• Federal election results (Clerk of House)
• My Congressional District (Census data)
• The Atlas of Redistricting
  
• Voting America (cinematic maps to 1840)
• Join California (CA elections, historical)
• CA Elections Data Archive
  
• Cooperative Congressional Election Study
• 2016 county results
• 2016 results by House district
  
• 2016 House popular vote
• 2018 House popular vote
• 2020 House popular vote
• 2022 House popular vote
  
• Precinct map of 2016 election
• Precinct map of 2020 election
  

Election Process

• Frontloading HQ (nomination process)
• US Election Assistance Commission
• Election Law Blog
• Election Law Center
• Campaign Legal Center
• League of Women Voters
• Ballot Access News
• FairVote
• National Pop Vote (anti-Elect. College)
• Save Our States (pro-Electoral College)
• Initiative & Referendum Institute
• Recall Elections Blog

Campaign Info

• Political TV Ad Archive
• Living Room Candidate: ads
• 2016 Ads
  
• 4president.org
• Wesleyan Media Project
• UCLA Campaign Lit Archive
• Campaign documents & artifacts
• Comm on Presidential Debates
• Video clips of presidential debates
• Factcheck.org
• PolitiFact.org
  

Election Polls 

• Rose Institute
• Pew Research Center
• PPIC
• FiveThirtyEight
• The Polling Report
• RealClearPolitics
• Presidential election exit polls through 1996 (NY Times)
• Congressional election exit polls 1992-2014
• State-level results and exit polls 1998
• Exit polls 2004 (CNN)
• Exit polls 2006 (CNN)
• Exit polls 2008 (NYT)
• Exit polls 2010 (CNN)
• Exit polls 2012 (Wash Post)
• Exit polls 2014 (NBC)
• Exit polls 2016 (CNN)
• Exit polls 2018 (CNN)
• Exit polls 2020 (CNN)
• Exit polls 2022 (CNN)