Washington bars DeepSeek from federal IT systems and Beijing objects

The Department of Homeland Security has blocked China-based DeepSeek from federal IT systems^3,7. The Chinese technology is being removed from most US government agencies as the race for AI dominance steps up¹. The order directed every federal agency to purge DeepSeek; it was signed by Secretary of Homeland Security Markwayne Mullin on 24 July 2026, with a courtesy copy to budget director Russell Vought⁸.

China said the US ban on DeepSeek from government IT systems disregards the consensus between the two countries². In Beijing, Foreign Ministry spokesperson Mao Ning defended the company⁵.

Why it matters to investors

The ban extends the technology contest between Washington and Beijing from chips and hardware to AI models and the software built on them^1,3. The security concern cited for the ban is that China-based servers could potentially expose sensitive US data to Chinese authorities⁶. That is a US claim; Beijing rejects it and calls the ban a breach of the consensus it says the two governments had reached^2,5.

The House Select Committee on China has gone further in its claims. Last year it investigated what it described as DeepSeek’s role as a tool for the Chinese Communist Party to spy, steal and subvert export controls^3,7. Those are the committee’s allegations, not findings of a court, and China disputes them^2,6.

There is also a commercial dispute underneath the security argument. US firms have long accused Chinese rivals of distilling their AI models⁴. A government-wide ban does not rule on that complaint, but it puts the federal government on the side of the companies making it^1,4.

The order itself applies to federal IT systems^7,8. Its reach is still wide: it was sent to every federal agency, and it follows an established model for excluding a foreign technology supplier from government systems^1,8. The timing is notable as well, since the order was signed in July and its effects are only now being reported^3,8.

What to watch

Beijing’s response so far has been verbal^2,5. The question is whether it moves from statements to measures against US technology companies operating in China⁶.

In Washington, the test is whether the restriction spreads beyond federal systems, and whether other Chinese AI models face the same treatment as the AI race intensifies^1,3.