A group of WeChat users trying to block a US ban on the Chinese “SuperApp” can’t challenge President Donald Trump’s authority to make national security decisions, the US said.

“To hold otherwise would allow a group of social media users to substitute their subjective judgment” for that of the president “merely because they are unable to use an app that they prefer,” the government said Wednesday in a filing in San Francisco federal court.

The US government said in a court filing the president doesn’t have to provide exhaustive evidence to justify his decision that WeChat and TikTok are a national security threat

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The US WeChat Users Alliance filed a lawsuit to halt Trump’s Aug 6 order that will prohibit residents from doing transactions with Tencent Holdings Ltd’s WeChat as well as with ByteDance Ltd’s TikTok starting this month. The US government claims the apps can be used by the Chinese government to spread disinformation and allow it to access Americans’ personal and proprietary information.

The Commerce Department is to specify by Sept 20 which transactions with the apps will be off limits for Americans. Until then, the US says, the WeChat users can’t seek to halt the president’s order. TikTok filed a similar lawsuit in Los Angeles federal court and has said it will wait for the Commerce Department to explain what the president’s order entails before asking a judge to block it.

READ MORE: WeChat users sue to block Trump’s ban of messaging app

In Wednesday’s filing, the US said the president doesn’t have to provide exhaustive evidence to justify his decision that the apps are a national security threat. The government referred to the US Supreme Court decision two years ago upholding Trump’s travel ban for visitors from a group of Muslim countries that the president doesn’t need “to conclusively link all of the pieces in the puzzle.”

The case is US WeChat Users Alliance v. Trump, 20-cv-05910, US District Court, Northern District of California (San Francisco).