A judge will decide whether the crime Ms. Meng is accused of in the U.S. — deceiving banks into clearing transactions in Iran through a subsidiary company, in violation of sanctions against Iran — constitutes a crime in Canada.

Ms. Meng, the eldest daughter of Huawei’s founder, is Canada’s most famous detainee. She was arrested in Vancouver in December 2018, after the U.S. requested her extradition. Out on bail, she is living at a megamansion under 24-hour surveillance with a GPS tracker on her ankle.

What’s next: If Ms. Meng loses, she could appeal all the way to the Supreme Court of Canada in a process that could drag on for years. In the wake of the flight of the fallen Nissan chairman Carlos Ghosn from Japan, some have questioned whether Ms. Meng might also try to escape.

Washington forecast: Heated

The third impeachment trial of an American president is set to begin in earnest on Tuesday.

Dueling arguments in legal filings from the White House and the House’s impeachment managers previewed a heated debate and presented the legal strategies both sides are likely to employ.

The managers, appointed by the House Speaker Nancy Pelosi, will argue that the Senate should convict President Trump for abuse of power and obstruction of Congress related to a pressure campaign on Ukraine. The president’s defense team denounced the charges as a “brazen and unlawful” attempt to cost him re-election.