Which primary source document could a historian understand why the civil war started?

A Charleston Mercury editorial published in 1860

Explanation:

Charleston Mercury editorial published in 186. a year before the beginning of the US Civil War, would be and ideal item for an historian trying to understand the situation in the US at that time. Newspaper articles are considered one of the primary sources that are used to study history. They represent evidence and testimony of a time long passed.  

the federalist party which advocated strong centralization dominated the united states government till 1800. so 1800 election transformed the power from one party to another party for the first time and was thus a turning point in american history. so jefferson called it "revolution of 1800".

explanation:

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