A federal appeals court is hearing arguments Monday on whether to reinstate a gag order against Donald Trump in the federal case charging him with plotting to overturn the results of the 2020 presidential election.

Prosecutors with special counsel Jack Smith’s team will urge a three-judge panel of the Washington-based appeals court to put back in place an order barring the Republican former president from making inflammatory statements about lawyers in the case and potential witnesses.

The prosecutors say those restrictions are necessary to prevent Trump from undermining confidence in the court system and intimidating people who may be called to testify against him. Defense lawyers have called the gag order an unconstitutional muzzling of Trump’s free speech rights and say prosecutors have presented no evidence to support the idea that his words have caused harm or made anyone feel threatened.

The gag order is one of multiple contentious issues being argued ahead of the landmark March 2024 trial. Defense lawyers are also trying to get the case dismissed by arguing that Trump, as a former president, is immune from prosecution and protected by the First Amendment from being charged. The outcome of Monday’s arguments won’t affect those constitutional claims, but it will set parameters on what Trump as both a criminal defendant and leading presidential candidate can and cannot say ahead of the trial.