Canada generally doesn't have much problem coordinating with the US on tariffs on Chinese goods. A primary example is Chinese Vehicles. The trouble is that by launching a trade war against Canada, the US has lost the willingness of Canadians to participate in such coordination.
Re: Canadian dollars, it's the US dollar that I believe is the more salient concern [0]
[0] https://www.morningstar.com/news/dow-jones/20260825307/bitco...