MapLight Wisconsin combines three data sets:
- Contributions: Campaign contributions given to each member of the Wisconsin State Legislature. We currently include contributions made since January 1, 1993 to legislators who have served in the 2009-2010, 2011-2012, and 2013-2014 sessions. (Source: Wisconsin Democracy Campaign)
- Votes: How each member of the Legislature voted on every bill. (Source: Wisconsin State Legislature website)
- Support/opposition: Which interest groups and companies support and oppose key bills. (Source: MapLight research team, Wisconsin Government Accountability Board)
The data provided on the MapLight Web site is accurate as best as can be determined.