Donald Trump effort to keep US tech out of China alarms American firms

The Trump administration's crackdown has already prompted foreign firms to shun American components and technology over concerns that access to parts they need could be abruptly cut off.

The US administration’s push to prevent China from dominating the market for advanced technologies has put it on a collision course with the same American companies it wants to protect. Firms that specialise in microchips, artificial intelligence, biotechnology and other industries have grown increasingly alarmed by the administration’s efforts to restrict the flow of technology to China, saying it could siphon expertise, research and revenue away from the United States, ultimately eroding America’s advantage.

The concerns, which have been simmering for months, have taken on new urgency as the Commerce Department considers adopting a sweeping proposal that would allow the