"This is really hard."

It appears it might be.  But maybe not THAT hard. Even if it is, better to know now (" Mr. Trump’s administration must provide 90 days’ notice to Congress outlining its aims in trade talks before kicking off negotiations.") than by being gob-smacked at the table later.  "Dear Americans, thanks so much for the "heads up"...

"I don't envy negotiators."  

As bizarre as it may sound, some canuck negotiators might be eager to sit down and "square off" (or something) with the Americans across the table.  As weird as it may seem to most of us, some people RELISH the fray. They may walk into the room with a bunch of "and another thing!" and "or by the way..." requests (err...demands) of their own.  We don't know, and that's as it should be.  Shhh...maybe we've got negotiators who can't wait to do a little gob-smacking of their own.

If worst comes to worse, we might console ourselves that, "nothing is forever."  A parting shot might be: "see ya in four years."