Harvard Law School professor Lawrence Lessig has emerged as a key proponent of a Maine campaign finance measure that he argues could fundamentally alter the legal framework governing Super PACs, the independent expenditure committees that have become dominant forces in American elections since the 2010 Citizens United decision.

The Maine People's Law, which was approved by voters in a 2023 referendum, established strict contribution limits for candidates and political parties while also creating provisions aimed at curbing the influence of outside spending groups. Lessig contends that these provisions, if upheld by courts, could set a precedent that challenges the operational model of organizations that raise and spend unlimited amounts to influence elections.

What the Left Is Saying

Progressive advocacy groups and campaign finance reformers have embraced Lessig's analysis as a potential breakthrough in efforts to reduce money's influence in politics. The Campaign Legal Center, a Washington-based nonprofit that works on election law issues, has filed briefs supporting Maine's approach, arguing that contribution limits serve compelling government interests in preventing corruption and maintaining public confidence in the electoral process.

Senator Elizabeth Warren of Massachusetts said at a recent forum that the Maine model represents "the kind of bold state-level action we need when Congress won't act." She noted that the Supreme Court's jurisprudence has created space for states to experiment with different regulatory approaches. "If Maine's law holds up, it could be a game-changer for campaign finance across the country," Warren said.

Representatives from Common Cause and Public Citizen have similarly praised Lessig's legal framework, arguing that Super PACs represent an end-run around contribution limits that voters in many states have sought to impose through ballot initiatives. These groups contend that the Supreme Court's reasoning in cases like Citizens United and SpeechNow v. FEC—which established that independent expenditures cannot be limited—did not necessarily mandate unlimited coordinated spending.

What the Right Is Saying

Conservative legal organizations and free speech advocates view Lessig's arguments with skepticism, contending that they represent an attempt to use state law to accomplish what campaign finance reformers have failed to achieve through legislation or constitutional amendment. The Institute for Justice, a libertarian public interest law firm, has argued that contribution limits on independent groups violate the First Amendment rights of political association.

Senate Minority Leader John Thune of South Dakota described efforts to restrict Super PAC operations as "another attempt by liberal activists to silence conservative voices." In a statement, he said: "These organizations comply with all existing campaign finance laws. If Maine's approach were allowed to spread, it would only benefit candidates and causes favored by wealthy insiders who can write large checks directly to campaigns."

The Center for Competitive Politics, a group that opposes campaign finance restrictions, has noted that Super PACs already face disclosure requirements and are prohibited from coordinating with candidates. These groups argue that limiting their contribution capacity would effectively silence smaller donors who pool resources through these organizations to compete with traditional party structures.

What the Numbers Show

Super PAC spending has grown substantially since 2010. According to OpenSecrets, which tracks political finance data, outside spending reached $1.8 billion in the 2024 election cycle, with Super PACs accounting for approximately $1.2 billion of that total. In Maine specifically, outside groups spent an estimated $45 million influencing state elections between 2014 and 2024.

The Maine People's Law caps individual contributions to candidates at $500 per election and prohibits corporate contributions entirely. It also includes provisions requiring greater transparency from groups that spend more than $1,000 on political advertising in the state. Supporters say these limits are substantially lower than federal contribution ceilings struck down by courts in other contexts.

FEC data shows that the average Super PAC raised approximately 68 percent of its funds from donors contributing $10,000 or more during recent election cycles. Reformers argue this concentration demonstrates how unlimited spending vehicles advantage wealthy interests at the expense of ordinary citizens who cannot afford to write large checks directly to candidates.

The Bottom Line

The Maine case is likely to reach federal courts regardless of its initial implementation. Legal experts from across the ideological spectrum expect challenges arguing both that the law unconstitutionally restricts speech and that it does not go far enough in distinguishing between permissible and impermissible spending categories. Lessig's particular contribution has been to argue that existing Supreme Court precedent may not foreclose all approaches to limiting independent expenditures, a view that remains contested among election law scholars.

What happens next will depend on how courts assess the specific provisions of Maine's law and whether they distinguish between different types of political spending. If courts accept Lessig's framework, other states could adopt similar measures as a way to regulate outside groups that current federal law leaves largely unchecked. If courts reject it, reformers may shift their attention back to constitutional amendment efforts or workarounds like small-dollar public financing programs.