India, Oct. 4 -- Canada has long been the largest trading partner of the United States, and the two countries have been so intertwined that President Trump spoke of it as the 51st state of the US.

In Prime Minister Carney, the Canadians have an able administrator and communicator, as witness the swiftness with which he repaired relations with India after Justin Trudeau was forced to resign by his own party legislators.

Yet, if we were to go by the rhetoric of President Trump about Canada, it would appear as though the United States and Canada were foes of each other. Trump has threatened, and indeed has imposed, a broad spectrum of tariffs on Canadian products sold in the United States, despite much of these being produced by US compani...