history has largely forgotten that nafta was a result of something called the mcdonald report, named after unfortunately named liberal cabinet minister donald mcdonald, who used to have to sit at the poorly named table with hume wrong and the other badly named ministers. it was actually the trudeau government who recommended that canada pursue a policy of "reciprocity", to resurrect the failed policy of the laurier era. trudeau then famously opposed the agreement, because it wasn't a free trade agreement, but rather an investor's rights agreement he called a "monstrous swindle". 

it's worth realizing that nafta would have looked very different if trudeau had overseen it than if mulroney had. but we don't often get the opportunity to redo history.

one of the things that canada fought against very hard in the initial round of the negotiations was the inclusion of mexico. there was an initial agreement called the fta negotiated bilaterally between the united states and canada, and that was expanded to nafta, only after canada fought like hell to stop it, and there was talk of "side agreements" to do with environmental and labour considerations, which were necessary then but nobody remembers now.

if canada can get out of this trilateral agreement and sign bilateral agreements instead, it should.