The DISCLOSE Act, formally known as the Democracy Is Strengthened by Casting Light on Spending in Elections Act, is a recurring federal campaign finance reform bill introduced in the United States Congress since 2010. The legislation aims to amend the Federal Election Campaign Act of 1971 to enhance transparency in political spending by requiring greater and faster public disclosure of donors to political ads, campaigns, political action committees (PACs), super PACs, corporations, labor organizations, and other entities involved in election-related advertising. It specifically targets the reduction of 'dark money'—anonymous contributions that fund political ads without revealing their sources—by mandating real-time online disclosures of contributions over certain thresholds and identifying top donors in advertisements. The bill has been championed by Democrats as a means to combat corruption and increase accountability in elections, but it has faced consistent opposition from Republicans, who argue it infringes on free speech rights protected under the First Amendment and Citizens United v. FEC Supreme Court decision.

First introduced in the 111th Congress as H.R. 5175 in 2010, the DISCLOSE Act passed the House but stalled in the Senate after a filibuster. It has been reintroduced in subsequent sessions, including the 117th Congress (S. 443 and H.R. 1960 in 2021) and the 118th Congress (S. 512 and H.R. 1118 in 2023), with sponsors such as Senators Sheldon Whitehouse (D-RI) and David Cicilline (D-RI, now Representative). Key provisions include requiring organizations spending over $10,000 on electioneering communications to disclose donors contributing more than $1,000, and mandating that CEOs or equivalent executives appear in ads funded by their organizations. Despite bipartisan co-sponsorship in early versions (e.g., Republicans Mike Castle and Walter B. Jones in 2010), it has garnered almost no Republican support in recent iterations, highlighting partisan divides on campaign finance reform.

The bill's repeated failure to become law underscores ongoing debates over money in politics, with proponents arguing it would restore public trust in democracy by exposing undue influences, while critics view it as an overreach that could chill political participation. As of 2023, the DISCLOSE Act remains pending in committees, with no passage in either chamber during the current session. Its persistence reflects broader efforts to address the influx of undisclosed funds post-Citizens United, estimated to exceed billions in recent election cycles.