The Columbian Exchange describes the interaction between the Americas and the rest of the world that occurred as a result of European exploration in
the 15th and 16th centuries. One of its most important outcomes was the
spread of new plants, animals, and diseases across the Atlantic Ocean. For
instance, potatoes spread from the Americas to Europe, while Europeans
brought the first horses to the Americas. Which of the following historical
themes is applicable when studying this aspect of the Columbian Exchange?

the mexican-american war was a conflict between the united states and mexico, fought from april 1846 to february 1848.

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.