Tracks the influence of money on U.S. politics, and how that money affects policy and citizens' lives. Center for Responsive Politics' site on campaign financing. Who's donating to whom, PACs, soft money; look candidates up by name or zip code to see where their campaign money is coming from.
Pew Research Center is a nonpartisan fact tank that informs the public about the issues, attitudes and trends shaping America and the world. Contains public opinion polling, demographic research, content analysis and other data-driven social science research.