Increasingly, both sides appear to be resorting to courts to try to press their cases.
Huawei is seeking a permanent injunction on the NDAA restrictions and a declaratory judgement that the restrictions are unconstitutional.
According to the complaint, Huawei views Section 889 as a roadblock to it gaining more market share in the US telecoms market.
China has become addicted to western technology components, and Huawei can't afford to get cut off from US suppliers, especially as it seeks to build the world's next generation of wireless modems, Capri said. The administration pushed Canada to arrest Huawei Chief Financial Officer Wanzhou Meng in December on charges relating to violating an embargo against Iran.
Washington wants to put Meng on trial on fraud charges for allegedly violating Iran sanctions and lying about it to USA banks, and the case has become a major headache for Ottawa. The company's complaint argues that the law violates the U.S. Constitution.
Huawei's suit might also survive long enough to reach the discovery stage, at which point the company would be able to demand US government documents it could search for evidence that the ban on its products is political in nature. But few have ever been successful in persuading a Canadian court not to extradite to the USA, said Brad Simon, a former federal prosecutor in Brooklyn, New York, who is now a partner at Phillips Nizer LLP.
"The US Congress has repeatedly failed to produce any evidence to support its restrictions on Huawei products".
The United States makes up 20 to 25 percent of the worldwide market for computer and telecom technology.
"They should take legal action to protect their rights like we protect our rights in the United States", he said.
The most recent high-profile target was South Korean retailer Lotte, which sold land to the Seoul government for a US anti-missile system opposed by Beijing. "No contrary evidence has been offered". He said that any alleged security risks could easily be managed. Industry analysts say excluding the Chinese vendor from markets for 5G equipment would reduce competition and might lead to higher prices.
Founded in 1987 by a former military engineer, Huawei overtook Ericsson in 2017 as the biggest global supplier of network gear.
Vodafone said any move by Britain to bar equipment made by China's Huawei from all parts of new 5G networks would cost it hundreds of millions of pounds and "very significantly" slow down the deployment of the new technology.
Andy Purdy, the chief security officer for Huawei's USA business, defended the company in an interview with Cheddar in January, saying that "no government has ever asked us to spy" and calling the accusations part of a "drumbeat of anti-Huawei criticism".
German telecoms operators have opposed Washington's calls to ban Huawei on concerns that its kit may contain "back doors" open to cyber spies and that under Chinese law it is required to collaborate in state espionage efforts.
On Monday, the Chinese government accused the two men of acting together to steal state secrets.
The Canadian government approved extradition proceedings against Meng on March 1.