Douglas Irwin’s Foreign Affairs piece
is a great read: The False Promise of Protectionism
Related:
Trump’s Protectionist Policies
An informative piece from Megan McArdle: Trump
Fixates on Canadian Softwood. You Shouldn't.
https://www.bloomberg.com/view/articles/2017-04-25/trump-fixates-on-canadian-softwood-you-shouldn-t
UPDATE: Milk Wars Curdled U.S.-Canada Relationship
Long Ago by Stephen Mihm
https://www.bloomberg.com/view/articles/2017-04-29/milk-wars-curdled-u-s-canada-relationship-long-ago