The administration also wants to make Nafta the first U.S. trade pact to police "currency manipulation." That would be a big deal -- and one that may be easy to reach, because neither Canada nor Mexico face such accusations, which are usually leveled at Asian trading partners. The goal would be to establish this as precedent for future trade pacts.

--Jacob M. Schlesinger in Washington, Anthony Harrup in Mexico City and Paul Vieira in Ottawa contributed to this article.

Write to William Mauldin at william.mauldin@wsj.com

(END) Dow Jones Newswires

July 17, 2017 20:00 ET (00:00 GMT)

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