The best and most correct answer among the choices provided by the question is the second choice "He let his party campaign for him."
In 1860<span>, </span>Lincoln<span> won the party's </span>presidential<span> nomination. In the November </span>1860 election<span>, </span>Lincoln<span> again faced Douglas, who represented the Northern faction of a heavily divided Democratic Party, as well as Breckinridge and Bell.</span>
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A. American involvement helped the democratic south defeat the communist north , and a republic was established
The Civil War started because Abraham Lincoln was against slavery even though he had slaves and plus it also happened because of him signing the Ammendment of being against slavery even though he still had slaves.