As wealthy but lightly defended countries have often learned, being close to a much more powerful state – geographically or diplomatically – can be a precarious existence. All it takes is an aggressive new government in the stronger state and a relatively equal relationship of economic and military cooperation can suddenly turn exploitative, even threatening.
Since Donald Trump’s second inauguration, this realisation has been dawning across the west, but nowhere more disconcertingly than in Canada. Its border with the US is the longest in the world: 5,525 miles of often empty and hard to defend land, lakes and rivers. Canada’s two biggest cities, Toronto and Montreal, are only a few hours to the north, were you to approach them in a US army tank.
