13th Amendment: Abolished slavery. 100% republican support, 23% democrat Support.
14th Amendment: citizenship to freed slaves. 94% republican support, 0% democrat support.
15th Amendment: voting rights for all. 100% republican support, 0% democrat support.
From Wikipedia: "The republican party was founded in 1854 by Northern anti-slavery activists. The main cause was opposition to slavery. The Republicans saw the expansion of slavery as a great evil. Abraham Lincoln was the first Republican president."
Obamacare: 0% Republican Support, 100% Democrat Support