Very curious if this will result in US tariffs for car imports from Canada. Also curious how those tariffs would be justified (they‘re always using Terrence Howard math but at least pretending to be analytical). „Canada has to pay because China bad“?

The US has been signalling an end to free trade in north america, so that would be coming in 2026/2027 regardless.

Trump said, “Well, that's OK, that's what you should be doing. I mean, it's a good thing for him to sign a trade deal. If you can get a deal with China, you should do that, right?”, so he doesn't seem annoyed by it so why would he impose tariffs?

Trump could increase the tariffs he already set in April 2025 for new cars manufactured in Canada. Depending on the car model the increases vary between 2500 and 15000 USD.