Attorney Richard Peck referred to Trump's comments during a brief court appearance by Huawei CFO Meng Wanzhou. Canada arrested Meng, the daughter of Huawei's founder, on Dec. 1. She is wanted in the U.S. on fraud charges.
The U.S. and China have tried to keep Meng's case separate from their trade dispute, although Trump has said that he would consider intervening in the case if it would help forge a trade deal with Beijing.
Peck called the case unique, saying there are "concerns about political characters, motivation, comments by the U.S. president." The lawyer said the case is complex and will take time, and as a result the defense and prosecution have agreed to wait until May 8 to fix a date for an extradition hearing.
Peck said abuse of process motions will likely be brought. Meng is suing the Canadian government, its border agency and the national police force, claiming they detained, searched and interrogated her before telling her she was under arrest. She is free on bail in Vancouver and living in one of her two multimillion-dollar homes in the city.
Meng's lawyers noted in a statement last week after Canada agreed to let the extradition hearings proceed that Trump "has repeatedly stated that he would interfere in Ms. Meng's case if he thought it would assist the U.S negotiations with China over a trade deal."
Her arrest at the Vancouver airport set off a diplomatic furor that has severely strained Canadian relations with China. China detained former Canadian diplomat Michael Kovrig and Canadian entrepreneur Michael Spavor on Dec. 10 in an apparent attempt to pressure Canada to release Meng. Kovrig and Spavor haven't had access to a lawyer since being arrested.
A Chinese court also sentenced a Canadian to death in a sudden retrial on allegations of drug trafficking, overturning a 15-year prison term handed down earlier. China is also blocking some imports of the agricultural product canola from Canada in a development that could be related to Meng's case.
Huawei is a focus of U.S. security concerns. Washington has pressured other countries to limit use of its technology, warning they could be opening themselves up to surveillance and theft of information.
Outside the court, protesters gathered to support Meng while others criticized the Chinese government and called for the release of the two detained Canadians. Kuang Yang burned a small Chinese flag and said through a translator that he opposes the Communist government using the two detained Canadians as "political pawns."
"The Chinese government is prosecuting ... the two Canadians as retaliation to Canada, but Canada is just doing its due process to extradite Meng to the U.S. to get a fair trial," he said.
Associated Press writer Jim Morris reported this story in Vancouver and AP writer Rob Gillies reported from Toronto.