What were the things that had to be done to the reconstructionist era?

Reconstruction encompassed three major initiatives: restoration of the Union, transformation of southern society, and enactment of progressive legislation favoring the rights of freed slaves.

Explanation:

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then its a law the end

the doctrine of nullification recommended that states living inside the union have the one-sided, inalienable ideal to void any law made by the national government that could be esteemed illegal.

the united states was shaped based on a general agreement among its individual states. hence, it is inferred that under the hypothesis of invalidation, since the states are the establishment of the union, they have the ability to referee and disprove unlawful laws.