Well, to start, the Supreme Court could have ruled differently in Plessy v. Ferguson.
In Plessy, the Supreme Court condoned the practice of "separate but equal" making it permissible for the white south (and north) to create discriminatory practices.
Trade Restriactions would be a good title. Embargoes limit and restrict trade between nations, Quotas limit the quantity of goods being traded, Subsidies make certain goods cheaper to produce in foreign markets, and a Teriff is a tax put on imports and exports.
Answer:
The great lakes are in between the USA and Canada
Along the east coast if I remember correctly since many resided near ports.
