The Center for Responsive Politics is a non-profit organization based in the United States that focuses on tracking money in politics. It provides detailed information about campaign finance, lobbying, and the influence of money on political decisions. The organization aims to promote transparency and accountability in the political process. Through its website, the Center offers a wealth of data, including contributions to candidates, political parties, and interest groups. It also analyzes trends in campaign spending and lobbying activities, helping the public understand the impact of money in politics on democracy and policy-making.