How many states did the union have in the civil war

20

Explanation:

During the American Civil War (1861–1865), the Union, also known as the North, refers to the United States of America, specifically to the national government of President Abraham Lincoln and the 20 free states and 5 border states that supported it

"a government in which power is divided between state and national levels". federalism is a system of government in which entities such and state and province, share power with the national government.

it was certainly a debatable decision, mainly because it was based primarily on political - and not on legal or social - views. since the congress at that time was led by members of the republican party, and the territory that the tribes wanted to turn into an exclusively indian state was predominantly democratic, the proposal (as expressed in the constitution) did not succeed, but the constitution itself proved to be of crucial importance in the creation of the state of oklahoma, and, most importantly, it guaranteed the involvement of representatives of the indian tribes in the government of the future joint state.  

as a member of congress, i would have voted to ratify the constitution, or at least to have it tabled. ignoring it was an interested and partial decision.