The faith, respect and trust of the US to follow its own rules is utterly destroyed.
It's really hard to overstate that the trust level is now a hard zero and it's likely staying there for decades.
Let's put this another way as an extreme. If this relationship existed for somewhere like Myanmar, Yemen or Turkmenistan it doesn't mean you can trust your safety once you're in the country.
Many Americans refuse to travel to Mexico on this premise. This is what I'm talking about. The US is now on that list.
They can only detain you until they hand you over to the Canadian police. [1]
Section (2) clearly states...
> (2) A preclearance officer is not permitted to exercise any powers of questioning or interrogation, examination, search, seizure, forfeiture, detention or arrest that are conferred under the laws of the United States.
[1] https://laws-lois.justice.gc.ca/eng/acts/P-19.32/FullText.ht...
Much like Trump's last term. He certainly said he would do a lot of things.