US Justice Department Cuts Antitrust Ties with Canada Amid Trade Row

A new front has opened in the ongoing trade tensions between the United States and Canada. According to a September 5 report by The Wall Street Journal, the U.S. Department of Justice has directed its antitrust division to suspend all cooperation with Canadian authorities.

An Abrupt Halt: Internal Directive Halts Collaboration

Linda Marshall, head of the international section within the DOJ's antitrust division, issued the directive via email this week, instructing officials to cease collaboration with their Canadian counterparts on ongoing cases and policy matters. The email did not specify the reasons behind the decision.

Officials familiar with the matter noted that such directives are unusual. The United States typically maintains operational cooperation with foreign competition regulators, even during periods of political friction between governments.

Breaking a Long-Standing Partnership

The suspension disrupts a deep and long-standing working relationship between the two nations' antitrust agencies. Their collaboration has spanned several key areas:

  • Auto Industry Probes: Joint investigations into global auto parts price-fixing.
  • Air Cargo Scrutiny: Coordinated oversight of competition in the air freight sector.
  • Tech & Aerospace Mergers: Cooperative reviews of major cross-border mergers in technology and aerospace.

The sudden freeze could impact several active cross-border investigations and regulatory reviews.

Widening Ripples from the Trade Dispute

This move follows the collapse of trade talks last month, after which the U.S. administration imposed 50% tariffs on approximately $20 billion worth of Canadian goods. Canada promptly retaliated with its own tariffs on select U.S. products.

The extension of friction from tariffs into law enforcement cooperation suggests a deepening and broadening of the bilateral trade conflict. As of now, neither the U.S. Justice Department nor the White House has offered public comment on the suspension.