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What Is Campaign Finance?

Learn what campaign finance means, where political money comes from, and how reporting works in U.S. elections.

Last updated: February 22, 2026.

Campaign finance is the system that governs how money is raised and spent in elections.

Main Sources of Campaign Money

  • Individual contributors
  • Political action committees (PACs)
  • Party committees
  • Candidate self-funding
  • Outside spending groups

Why It Matters

  • Funding can shape messaging, outreach, and competitiveness.
  • Public filings allow voters and journalists to track financial influence.
  • Large funding differences can affect election dynamics long before Election Day.

Where to Verify Data

  • FEC Open API and candidate filings
  • Congress.gov and official candidate pages
  • FederalVoice profile source links and update timestamps