From Michael Zak of The Grand Old Partisan blog:
On December 6th, 1865, the 13th Amendment — abolishing slavery — became part of the Constitution — when ratified by three-quarters of the states.
Despite protests from the Democrats, the Republican Party made banning slavery part of its national platform in 1864. Senator Lyman Trumbull (R-IL) wrote the final version of the text, combining the proposed wordings of several other Republican congressmen.
All Republicans in Congress voted for the 13th Amendment, while nearly all Democrats voted against it.
Text of The Thirteenth Amendment
Section 1. Neither slavery nor involuntary servitude, except as a punishment for crime whereof the party shall have been duly convicted, shall exist within the United States, or any place subject to their jurisdiction.
Section 2. Congress shall have power to enforce this article by appropriate legislation.
What do you think about that?