In the context of the presence of different subcultures in a federal system, was a regional interest that federalism allowed northern states to ban and southern states to maintain.

The correct answer is slavery.

Explanation:

Slavery is a situation where individuals are owned by the affluent class and their lives are largely controlled by them. It has been quite common throughout the history. When it comes to the federal government, it allowed the northern states to ban slavery, however, the southern states were still allowed to keep slaves for various purposes. The slaves were either responsible for plantation or the owner's personal duties at home.

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