WTF? First, we absolutely do mine vast amounts of metals, precious, semi-precious, and completely ordinary.
There’s almost no significant mineral in which our mining sector isn’t in the top 10 globally, and we’re top 5 in a large number (except silver, for some reason we don’t produce much of that). First in potash, second in uranium, 4th in aluminum, platinum and titanium, 5th in gold and nickel, 7th in cobalt and molybdenum, 8th in iron, zinc, and lithium, 10th in copper. [cite] The only countries that out-produce us are China, Russia, US, and Australia, and three of those have many times our population. And the other has never heard of permafrost.
Could the mining sector be larger still? Sure. Is it held back to some extent by regulations? Absolutely, and it damn well should be. Mining is one of the most environmentally destructive activities humans do, and with no oversight mining companies will happily destroy entire ecosystems. Are there completely untapped riches in the north? Yes of course, but exploiting them would require mind-bogglingly vast infrastructure investments to even begin tapping into. It’s also not mandatory that we denude ourselves of natural resources at the maximum rate possible. It’s okay to pass some mineral reserves on to our grandchildren.
Second, you’re happy to suggest halting hypothetical mineral exports to the US as trading leverage, but your Premier screams bloody murder when the same is suggested for oil & gas. And mineral exports have been suggested as leverage, potash in particular (Moe was no happier than Smith) because it would be devastating to the US agriculture sector. And iron and aluminum are subject to tariffs, which while harmful to our economy is significantly more harmful to the US economy. We don’t even get to use that as leverage, because Trump is already shooting himself in the foot with those.
It’s practically impossible to use trade leverage against Trump, because Trump is not an economically rational actor. He thinks restricting trade is a good thing, so threatening to restrict trade has no impact on him, except in absolutely nuclear cases like turning off energy taps that everyone except Doug Ford is loath to do.