On Dec. 1, 2021, Campaign Legal Center (CLC) filed a complaint with the Missouri Ethics Commission alleging Eric Greitens' gubernatorial campaign committee, Greitens for Missouri, violated state campaign finance law by failing to disclose in-kind contributions made to Greitens' U.S. Senate campaign. 

On Nov. 29, 2021, Campaign Legal Center (CLC) submitted public comments to the Washington Public Disclosure Commission (PDC) regarding proposed amendments to its disclosure rule for "commercial advertisers," including online platforms, that sell political advertising in state elections. CLC's comments include several recommendations that would ensure the PDC's amended rule continues to facilitate public access to important information about political ads concerning candidates and ballot measures in Washington.  

On Feb. 12, 2021, Campaign Legal Center (CLC) filed suit against Iowa Values, a nonprofit 501(c)(4) corporation that violated federal campaign finance law. Despite its major purpose of supporting the reelection of U.S. Sen. Joni Ernst, Iowa Values failed to register as a PAC and publicly disclose its donors and the recipients of its spending. CLC filed this citizen suit against Iowa Values after the Federal Election Commission (FEC) failed to enforce the law and a court ordered that the FEC’s inaction entitled CLC to sue Iowa Values directly under the Federal Election Campaign Act’s citizen suit provision.

On Nov. 19, 2021, a federal district court denied Iowa Value's motion to dismiss Campaign Legal Center's (CLC) private enforcement action against the group, recognizing that the citizen suit provision in federal campaign finance law is a “safeguard to protect the First Amendment rights of complainants” like CLC.

On Nov. 22, 2021, Campaign Legal Center (CLC)—joined by Citizens for Ethics & Responsibility in Washington (CREW), Common Cause and Democracy 21—filed an amicus curiae brief with the U.S. Supreme Court in FEC v. Ted Cruz for Senate. The brief urges the Court to uphold the constitutionality of the challenged law, a provision of the Bipartisan Campaign Reform Act (BCRA) that limits the post-election repayment of candidates’ personal loans to their campaigns. As noted in the amicus brief, contributions raised after Election Day to repay a candidate’s personal loans are functionally personal gifts to the candidate, not campaign speech, and limiting cash gifts that personally enrich candidates is a well justified and commonsensical protection against corruption and self-dealing.

On Nov. 19, 2021, Campaign Legal Center (CLC) filed a supplement to its complaint with the Federal Election Commission (FEC) alleging Rep. Jim Hagedorn's campaign committee illegally accepted corporate contributions in the form of free office rent. An Office of Congressional Ethics (OCE) probe confirmed the allegations.

On July 20, 2021, Campaign Legal Center (CLC) filed a complaint with the Federal Election Commission (FEC) alleging Rep. Jim Hagedorn's campaign committee illegally accepted corporate contributions in the form of free office rent. 

On Nov. 18, 2021, Campaign Legal Center (CLC) and Issue One (IO) submitted to the Federal Election Commission (FEC) their joint report documenting abuses of leadership PAC funds in the 2020 election cycle. The letter urged the FEC to proceed with a rulemaking that prohibits the use of leadership PAC funds for personal expenses.