No Labels, the organization that is considering a push to back a third-party presidential candidate in 2024, has been threatened with a lawsuit by several Democratic and nonpartisan groups if its financial backers are not disclosed. 

Because No Labels is a 501(c)4 nonprofit group, the organization is not bound by law to provide in-depth information about its donors. But the advocacy groups say No Labels is acting unlawfully, as other political parties are required to register with the Federal Election Commission and provide their funding sources and limits.