The law’s supporters have claimed TikTok presents a national security threat because the Chinese government could use it to collect data and push propaganda to US viewers. While Trump attempted to ban TikTok during his first term as president, he has expressed support for the app more recently. During his presidential campaign, he posted on Truth Social, “FOR ALL OF THOSE THAT WANT TO SAVE TIK TOK IN AMERICA, VOTE TRUMP!”

Several civil liberties and free speech groups, including the American Civil Liberties Union and Electronic Frontier, have filed their own brief supporting TikTok’s appeal and arguing that “the government has not presented credible evidence of ongoing or imminent harm caused by TikTok.”