Political Parties and the Presidents - Book 2 - United States History Series, #2

The issue of slavery loomed ever larger in American politics as the middle of the Nineteenth Century passed. The Republican Party, birthed to destroy the institution, inaugurated its first candidate in 1856. Four years later Abraham Lincoln gained the nomination. The Democratic Party, committed to preserving and expanding slavery, nominated Stephen A. Douglas. Abraham Lincoln won the presidency, casting the nation into a bloody civil war.
Abraham Lincoln's issuance of the Emaciation Proclamation did not end slavery, but it led to its demise at war's end. A History of United States Presidential Elections - Book 2, covers the critical pre Civil War years from 1856 until 1865.