There is no going back, there will not be negociations, the americans want to loot us and it's just a matter of not letting them. There will not be adults in the room and this "be nice Donald and keep your yapper shut until we have talks" is worrying if sincere and insulting if cynical. In either case it exposes this guy as the obvious empty banking mercenary suit that is almost certainly is. This is once again liberal just handing over all the ammunitions to the "bad cop" of this "two party one system" so we can get reamed for 4 years of Donald while they keep their hands clean.
The establishment is making them bet that "now that we're under attack we'll rally around the flag and not elect a system-smashing demagogue". That's how they WANT to lose.
That's exactly the kind of hedging their bets centrist bull that will lose them the election. We already know they are insincere and there won't be negotiations because even an agreement would have no value. Give the Orange douche a bloody nose right now, rather than putting red lines he's obviously going to cross and that will just make Canada lose face for nothing.