Odd that you continuously condemn Lincoln for what you claim are violations of the Constitution while at the same time ignoring the contempt that Jeff Davis had for the confederate constitution.
How did Lincoln violate the Constitution in regards to slavery? You need to read the Emancipation Proclamation again. Lincoln didn't end slavery in that document, didn't even pretend to end slavery. He used his power as Commander-in-Chief of the U.S. military, and as a move necessary to put down the rebellion, to declare all slaves to be free in specific areas of the country. He didn't declare slavery itself illegal. He may have demonized the institution, but current presidents have condemned abortion and have used their office to do all that they could to weaken the availability of abortion, and they didn't violate the Constitution by doing that.