After being passed by both houses of Congress, a constitutional amendment must still be passed by 3/4ths of the states. After it is passed by Congress and the states, it still must be approved by the US President. This is because the president has the power to veto any law passed by Congress. If the president vetoes (stops it from becoming a law) the amendment, the veto can be overrode by another vote in Congress.
William H. Seward was the Secretary of State
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Explanation:
A century after the arrival of Christopher Columbus, some 90% of indigenous Americans had perished from "wave after wave of disease", along with mass slavery and war, in what researchers have described as the "great dying".