Now with Europe and its tariffs, I can 'somewhat' understand to support your neighboring nations to build their economies under EU umbrella.
Having stable neighbors is a good idea.
So you see things made in Poland, Slovenia, Baltics, even Turkey gets something as the infamous Vestel is there assembling TVs even though its not fully in the EU.
USA could do this to decide to foster development and have stable neighbors that could deal with drugs and corruption fed by demand in USA creating better Americas.
Creating opportunities for their people to have decent lives in their home country.
It would as UK citizens found out ( for a while ) allow you to choose cheaper place to live out retirement if you don't mind learning another language.
Though
It would cramp the style of business employing/exploiting day labor in farming, construction, gardening/landscaping, golf courses, hospitality and many manuel labor jobs.
Problem is that manufacturing in Mexico etc is more visible than in China.
Its easy to create disaffection about this. Factory in China no one really noticed much.
So Canada and Mexico especially become hated targets.