

Folks have been suing the gov about the Safe Third a country agreement since 2005 - opposition isn’t new. And yes, the courts did strike it down but the gov appealed, and it’s still under review.
The govs website about the agreement even includes a section on why the US is considered a safe country.
I think assuming they are ‘behind the curve’ is … generous.
Oh, they are very aware. The STCA has been before the courts a few times. You can read about it here: https://ccrweb.ca/en/safe-third-country