The U.S. Supreme Court agreed Monday to hear a Republican-led challenge to a provision of federal campaign finance law that restricts how much political parties can spend in coordination with candidates.

The case, which raises free speech concerns, involves Vice President JD Vance, who was an Ohio U.S. Senate candidate when the lawsuit was originally filed.

The justices accepted an appeal brought by Vance and two Republican committees, challenging a lower court ruling that upheld the spending caps. The challengers argue the restrictions infringe on constitutional rights by limiting party expenditures that reflect input from the candidates they

support, Newsweek reported.

The legal battle takes place against the backdrop of the Supreme Court’s landmark 2010 Citizens United v. FEC decision, which struck down limits on independent expenditures by corporations and outside groups, ruling that such restrictions violated the First Amendment’s free speech protections.

While Citizens United paved the way for unlimited outside spending, the legality of coordinated expenditures between candidates and political parties remains the central issue in this renewed constitutional debate, the outlet reported.