https://www.reuters.com/article/us-usa-china-wechat-explainer/explainer-how-the-u-s-could-block-wechat-and-tiktok-from-americans-idUSKCN2572N3

President Donald Trump has threatened to ban the short-video app TikTok and messaging service WeChat by late September on grounds that the Chinese-owned apps pose a national security threat. It would mark the first time the United States has attempted to shut down widely used mobile internet apps.