The second Trump administration has been worse than Canada’s worst nightmare. The largest military force in the history of the world, across a largely undefended border, is suddenly under the command of a president who has called for our annexation. Canada could not be less prepared. The possibility of American aggression has been so remote, for so long, that the idea has not been seriously considered in living memory. Donald Trump has focused on economic rather than military pressure, but the new tone in Washington is finally forcing Canada to ask itself the most basic question: how do we defend ourselves?

For most other countries in the world, self-defence is the key to national identity. Canada’s immense good fortune has been that we haven’t really needed a strong military to build our country. In the war of 1812, we were British, and the British kept us alive because we were British. There hasn’t been an attack on our homeland since. Confederation, the founding of the country, was the result of a political negotiation rather than a conquest or a violent independence movement. Our military was based on a fundamental assumption about our place in the world, and the nature of the world itself. Our place in the world was to contribute to the global order. The global order shared our fundamental values. Peacekeeping was more our style than defense.

Recently, I’ve been working on Gloves Off, a podcast about how Canada can protect itself from any threat emanating from the US, and from every other country in the world now that the US is no longer our........

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