I think the main cause was slavery in the economy and society and there were pro slavery and free states so that didn’t work out
Answer:
the policy of extending the rule or authority of an empire or nation over foreign countries, or of acquiring and holding colonies and dependencies. advocacy of imperial or sovereign interests over the interests of the dependent states. imperial government; rule by an emperor or empress.
Spain have all the power so us will be part of Spain like new Mexico and Dominican Republic
Answer: Because their are out there teens.
Explanation: