Ehhh. Most of the extraction happens in the south too, because you need workers (edit: and reasonably low shipping costs). Like, Fort Mac is a little further north, but it's still below 60N, in Alberta.

Mining and O&G put together are like 5% of Canada's GDP. All the valuable real estate and I suspect much of the industries other than mining and logging are concentrated in the major cities. You'd get like 90% of the benefits from controlling 10% of the country. Not that I'd expect Trump to realize this. Luckily he seems to be as dumb as he is evil.

Or at least passively support us, which works.

Yea 90% of Canadians live within 100 miles of a 6,416 kilometre (3,987 mile) largely unsecured border. The counter insurgency would be unparalleled in human history.

They don't need to capture empty land. They need capital cities and a few other strategic points.

Because it is delusional. Afghanistan is a world away, has strong cultural influence for that kind of combat, and isn't filled with people who came to the country with the intention of going to the USA.

When surveyed about 49% of Canadians say they wouldn't fight for their country. 10% would welcome being annexed by the USA- after all, many people only come to Canada because they couldn't get into the usa. We don't have anything close to the resolve afgans have, and we don't have the stomach for war. Sure, we have some elite snipers, but snipers an army do not make.

There's no point in this conversation though, because anybody who thinks Canada stands a snowballs chance in hell against the USA is a full scale invasion isn't going to respond to reason.