A newly minted law forcing TikTok's parent company to sell the video-sharing platform or face a ban in the U.S. could be in for an uphill battle in court. The app’s China-based owner, ByteDance, filed a lawsuit Tuesday, calling the measure unconstitutional. Critics of the sell-or-be-banned ultimatum argue it violates TikTok users' First Amendment rights. But a court challenge's success is not guaranteed. The law's opponents, which include advocacy organizations like the American Civil Liberties Union, maintain that the government hasn't come close to justifying banning TikTok, while others say national-security claims could still prevail. For years, lawmakers on both sides of the aisle have expressed concerns that Chinese authorities could force ByteDance to hand over U.S. user data, or influence Americans by suppressing or promoting certain content on TikTok. The U.S. has yet to provide public evidence to support those claims, but political pressures have piled up regardless. If upheld, legal experts also stress that the law could set a precedent carrying wider ramifications for digital media in the U.S. Here's what you need to know. IS A TIKTOK BAN UNCONSTITUTIONAL? That's the central question. TikTok and opponents of the law have argued that a ban would violate First Amendment rights of the social media platform's 170 million U.S. users. Patrick Toomey, deputy director of the ACLU’s National Security Project, previously told The Associated Press that a TikTok ban would “stifle free expression and restrict public access” to a platform that has become central source for information sharing. Among key questions will be whether the legislation interferes with the overall content of speech on TikTok, Elettra Bietti, an assistant professor of law and computer science at Northeastern University, noted following the law's passage last month — as content-based restrictions meet a higher level of scrutiny. “Congress has taken the unprecedented step of expressly singling out and banning TikTok: a vibrant online forum for protected speech and expression used by 170 million Americans to create, share, and view videos over the Internet,” ByteDance said in its lawsuit Tuesday. “For the first time in history, Congress has enacted a law that subjects a single, named speech platform to a permanent, nationwide ban, and bars every American from participating in a unique online community with more than 1 billion people worldwide.” COULD TIKTOK SUCCESSFULLY PREVENT THE BAN IN COURT? TikTok has expressed confidence about the prospects of its legal challenge. “Rest assured, we aren’t going anywhere,” TikTok CEO Shou Chew said in a video response posted to X shortly after the legislation was signed into law on April 24. “The facts and the Constitution are on our side, and we expect to prevail again.” Toomey also said that he was optimistic about the possibility of TikTok being able to block the measure in court, noting that both users and the company “have extremely strong" First Amendment claims. “Many of the calls to completely ban TikTok in the U.S. are about scoring political points and rooted in anti-China sentiment,” Toomey added. “And to date, these steps to ban TikTok had not been remotely supported by concrete public evidence.” Still, the future of any litigation is hard to predict, especially for this kind of case. And from a legal perspective, it can be difficult to cite political motivations, even if they're well-documented, as grounds to invalidate a law. The battle could also string along for some time, with the potential for appeals that could go all the way to the Supreme Court, which would likely uphold the law due to its current composition, said Gus Hurwitz, a senior fellow at the University of Pennsylvania’s Carey Law School. HOW MIGHT THE GOVERNMENT RESPOND TO THE CHALLENGE? TikTok's legal challenge won't go on without a fight. The government will probably respond with national-security claims, which were already cited prominently as the legislation made its way through Congress. Toomey maintains that the government hasn't met the high bar required to prove imminent national-security risks, but some other legal experts note that it's still a strong card to play. “One of the unfortunate and really frustrating things about national-security legislation (is that) it tends to be a trump card,” Hurwitz said. "Once national-security issues come up, they’re going to carry the day either successfully or not." Hurwitz added that he thinks there are legitimate national-security arguments that could be brought up here. National security can be argued because it's a federal measure, he noted. That sets this scenario apart from previously unsuccessful state-level legislation seeking to ban TikTok, such as in Montana. But national-security arguments are also vulnerable to questioning as to why TikTok is getting specific scrutiny.