Who were the Copperheads?, assignment help

Here are the questions. 
Who were the Copperheads?
Who were the “Transcendentalists” and what was the basis of their beliefs?
What caused the Mexican-American War of 1846?

you have to complete a small scale research effort of the question and complete a 1.5 -2 page paper. A works cited page will be included (please utilize at least 2-3 different appropriate sources). 1 source for each title.
And at the end please do the research in MLA format,. 
Works cited page is needed at the end.

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