The U.S. Supreme Court case Michael Clingman, Secretary, Oklahoma State Election Board, et al. v. Andrea L. Beaver et al., 2004 revolved around the issue of whether Oklahoma's semi-closed primary system violated the First Amendment rights of political parties and their members by not allowing them to invite registered Independents to vote in their primaries. The Libertarian Party of Oklahoma challenged this law arguing that it infringed upon its right to associate with Independent voters during primary elections. However, the Supreme Court upheld Oklahoma’s election laws stating they did not violate any constitutional rights as claimed by the plaintiffs because states have a significant interest in maintaining an organized and stable political system which includes regulating how political parties select their candidates for general elections. This decision reaffirmed that while individuals and groups have broad freedoms under the First Amendment regarding association and speech; these freedoms are balanced against state interests such as ensuring orderly electoral processes.

In the dissenting opinion for the case of Michael Clingman, Secretary, Oklahoma State Election Board, et al. v. Andrea L. Beaver et al., Justice Stevens argued that Oklahoma's semi-closed primary system violated First Amendment rights by limiting political association and expression. He contended that this law prevented Libertarian Party members from inviting registered Independents to participate in their primaries - a restriction he viewed as an unnecessary burden on their freedom to associate politically with like-minded voters outside of their party affiliation. Furthermore, he disagreed with the majority's assertion that this limitation was justified by state interests in preserving parties' ability to define their own boundaries or preventing voter confusion or raiding (the practice of voting in another party’s primary election to influence its outcome). Instead, he believed these concerns were speculative at best and did not outweigh constitutional freedoms.