Us victory in the mexican american war in 1848
The plague stopped the movement plus lack of technology
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A unitary government gave them too much power to the states
Answer:
James Monroe
Explanation:
James Monroe is considered as one of the founding fathers of the United States of America. He was the United States President between 1817 to 1825. He was preceded by James Madison and succeed by John Quincy Adams. He was the fifth President of the United States of America. He was a member of the Democratic-Republican Party.
His administration was famous for the Monroe Doctrine and Era of Good Feelings.