U.S. Said to Tell Canada That It Will Enforce a Visitor Registration Law

The United States had not been enforcing the rule for Canadians who entered via land borders. That is changing amid an escalating fight between the North American neighbors.

Archived version: https://archive.is/20250312142556/https://www.nytimes.com/2025/03/11/us/politics/trump-canada-registration-immigration.html

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