Prime Minister Brian Mulroney of Canada and President Carlos Salinas of Mexico, pictured below.
Bush negotiated all its terms, promoted the policy, then "fast tracked" its signing. Evidently, he wanted NAFTA to be HIS legacy. The negotiations and terms of the treaty had actually wreaked havoc during the extremely divisive Canadian parliamentary elections as far back as 1988, and continued to do so until 1993. Mulroney was forced to resign in July of that year.
The treaty required ratification by their respective legislative bodies, which took place in the US after Bush Sr left office during the Clinton administration. Clinton added protections for American workers and required the partners to adhere to US environmental practices and regulations. Passage of the treaty by the US Congress was highly contentious. The vote breakdown in support of NAFTA was as follows: In the House GOP 132, Dems 102; in the Senate GOP 34, Dems 27....not exactly a resounding endorsement, but owing to its bipartisn support, Clinton then signed it into law
Yeppers. No two ways about it. NAFTA is a GOP brainchild which they inflicted upon us and has staunchly defended ever since, except, of course, when they are playing pin the blame on the democrats.