The McCain-Feingold Act, officially known as the Bipartisan Campaign Reform Act of 2002, is a significant piece of legislation aimed at regulating campaign finance in federal elections. It sought to eliminate the influence of soft money and reduce the impact of special interest groups on political campaigns by imposing stricter limits on contributions and expenditures. The act represented a response to concerns about the rising cost of campaigns and the role of money in politics, promoting greater transparency and accountability in electoral funding.