President Donald Trump
President Donald Trump delivers remarks at Kennedy Space Center after the launch of SpaceX Crew Dragon Demo-2 (GeekWire Photo / Kevin Lisota)

President Donald Trump signed an executive order Thursday blocking all transactions with ByteDance, the China-based company that owns TikTok, in 45 days.

Trump cited a “national emergency with respect to the information and communications technology and services supply chain” as the reason for the moratorium, escalating a dispute with TikTok that could force an acquisition of some or all of the social app by Microsoft or another company.

Trump initially announced his intention to ban TikTok last week but backed off of the plan after speaking with Microsoft CEO Satya Nadella about the American software giant’s plan to acquire TikTok’s business in the U.S. and a handful of other countries. Nadella and Trump agreed that acquisition talks would conclude by Sept. 15.

The new executive order, set to take place five days after that deadline, adds pressure to the negotiation talks. It also indicates that the president, who does not always follow through on bold propositions, means business.

The unusual executive order will almost certainly face legal challenges, however.

Update: In a statement Friday, TikTok said it was “shocked” by the executive order.

“For nearly a year, we have sought to engage with the US government in good faith to provide a constructive solution to the concerns that have been expressed,” the company said. “What we encountered instead was that the Administration paid no attention to facts, dictated terms of an agreement without going through standard legal processes, and tried to insert itself into negotiations between private businesses.”

TikTok warned the move by Trump “sets a dangerous precedent for the concept of free expression and open markets.”

Trump also signed an executive order related to WeChat, owned by China-based tech giant Tencent.

Initially, Microsoft expressed an interest in taking over the app in the U.S., Canada, New Zealand, and Australia but The Financial Times reported Thursday that the company has discussed the possibility of buying TikTok’s business in Europe and India as well.

Microsoft has acknowledged Trump’s concerns that ByteDance could be sharing information about users with the Chinese government, and said it would address the issue as part of the process. ByteDance and TikTok have denied the allegations.

Mergers and acquisition experts are debating TikTok’s price tag, estimating it could sell for anywhere from $10 billion to $50 billion.

Microsoft is well-positioned to pay top dollar for the coveted app. Its market value is at $1.6 trillion, and its cash, short-term investments stood at $136 billion as of June 30. The company’s largest acquisition to date was the $26.2 billion purchase of professional social media network LinkedIn in 2016.

Previously: What would Microsoft do with TikTok? Hit social video app goes against recent trend for tech giant

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