What do trade agreements have to do with copyright? The Canada-US-Mexico Agreement and fair dealing

Happy Fair Dealing Week!
February 25 to March 1 is Fair Dealing Week 2019. Fair Dealing Week (and Fair Use Week in the US) "is designed to highlight and promote the opportunities presented by fair use and fair dealing, celebrate successful stories, and explain these doctrines" (Association of Research Libraries, fairuseweek.org).