Who won the election of 1860 and what was the central issue of the election?

Lincoln; the central issue was Slavery

Explanation:

Abolitionist movements had been started in the north and the south by Quakers and escaped slaves like Harriet Tubman and Frederick Douglas

b or c im pretty sure

it was the "4. potsdam" conference that demanded the unconditional surrender of japan, since it was clear that the japanese would continue to find until the very last man otherwise.