Almost all large seizures of illicit fentanyl in the United States occur along the southern border with Mexico, according to a new report that casts more doubt on the White House’s claim that the drug is “pouring” into the U.S. from Canada.

U.S. President Donald Trump has cited the fentanyl crisis as a legal rationale to invoke emergency economic powers and impose tariffs on imports from Canada. But a Manhattan Institute report by Jonathan Caulkins and Bishu Giri of Carnegie Mellon University concludes that such levies, regardless of merits or drawbacks, cannot be justified as part of a pragmatic and data-informed response to the threat of illicit drugs in the U.S.

Canadian border authorities say they are investigating or taking enforcement action in 66 cases involving suspected senior Iranian officials who may have been allowed into Canada, despite a law that bars them from entering the country or remaining in it.

Of the 66, the Canada Border Services Agency has so far identified 20 people as inadmissible because they are believed to be senior Iranian officials, according to figures the agency provided to The Globe and Mail.

Bobby Monks was in her kitchen cooking dinner when the message came in over WhatsApp. Chicken was sizzling on the stove. Her son had just walked in the door. Her dogs were barking. She wasn’t wearing her reading glasses.

In this brief moment of domestic chaos, she clicked on a link that was supposedly going to help a friend activate his Instagram account. Instead, her own account got hacked. “This all went down in less than one minute,” Ms. Monks said. “I was like, ‘What the hell just happened?’”