They wanted to hold on to the cotton revenues, which were over 50% of the exports of the USA. And slavery was the mainstayof the cotton industry.
Northern England is tied culturally and economically to Quebec. Northern England relies on Quebec for much trade and they are from the same cultures.
Northern New England is tied culturally and economically to Canada. This is also the case for Western New York. Both regions are in close proximity to the border.
New Brunswick
Britain
seato
Lords of the Loom
Atlantic Canada. By its proximity to Canada's easternmost provinces, New England is economically tied with the maritime provinces (that is, New Brunswick, Nova Scotia and Prince Edward Island). Also, the French and English bilingual communities of Vermont are culturally tied with New Brunswick (an officially-bilingual province of Canada).
Sugar..
Lords of the Loom Lords of the Loom
For somewhere to be largely dependent on the British economy for its own economic strength and possibly to use the same currency.
System of orbits
System of orbits