The Justice Department is seeking an immediate ban on downloads of WeChat in Apple and Google app stores, saying the Chinese-owned messaging service is a threat to the security of the United States.
Last week the U.S. Commerce Department moved to ban WeChat from U.S. app stores but on Saturday, Magistrate Judge Laurel Beeler in California agreed to delay U.S. restrictions, saying they would affect users' First Amendment rights.
In a filing Friday, the Justice Department asked Beeler to allow for an immediate ban while the case works its way through court.
WeChat is a messaging-focused app popular with many Chinese-speaking Americans that serves as a lifeline to friends, family, customers and business contacts in China. It's owned by Chinese tech giant Tencent.
The Justice Department says WeChat allows the Chinese government to collect and use personal data on Americans to advance its own interests. The filing states WeChat has approximately 19 million active daily users in the U.S. in a range of formats, including text, images, video, and audio.
The Justice Department argues that the U.S. will suffer irreparable harm, both substantive and procedural, if the court does not stay its decision.
The Trump administration has targeted WeChat and another Chinese-owned app, TikTok, for national security and data privacy concerns, in the latest flashpoint amid rising tensions between Washington and Beijing.