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MapLight California: Research Guide

This section shows how to use our California website.

Ways to get started with MapLight California:

Visit our California home page.
Read our blog, Spotlight on California.
Click on the Legislators, Interest Groups, or Contributions tab at the top of the page.
Browse our list of research tools.

About our data

Read the details about our data sources and methodology. Data refers to direct contributions to the campaign committees of elected legislators. For example, contribution totals exclude contributions to party committees such as the RNC or the DNC and exclude contributions made to individuals that did not win their election.

For U.S. Congress, contributions data provided by the Center for Responsive Politics (OpenSecrets.org) and legislative data provided by GovTrack.us.
California contributions data provided by the National Institute on Money in State Politics (FollowTheMoney.org).
Wisconsin contributions data provided by the Wisconsin Democracy Campaign (wisdc.org).

MapLight California: Research Guide

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