[HandyDandy]

”If Opposition to slavery was an issue, Lincoln wouldn't have called for an amendment to make it permanent.”

That is a bold-faced, bald-faced, barefaced, in your face, lie.

[Texas Mulerider]

That is a bold-faced, bald-faced, barefaced, in your face, lie.

Actually, though he didn't call for it, Lincoln didn't oppose such a constitutional amendment. The Corwin Amendment would have been, ironically, the 13th, and would have permanently barred Congress from interfering with the institution of slavery where it then existed. It passed the House and Senate on the eve of Lincoln's election, and Lincoln said "holding such a provision to now be implied constitutional law, I have no objection to its being made express and irrevocable." The war began before it could be sent to the states for ratification.

[DiogenesLamp]

Read Lincoln's first inaugural address. He says it quite explicitly.

Lincoln supported an amendment to protect slavery.

Here. Let this black Boston College law professor explain it to you.

http://www.wbur.org/cognoscenti/2013/02/18/the-other-13th-richard-albert

Here is the original proposed 13th amendment.

"No amendment shall be made to the Constitution which will authorize or give to Congress power to abolish or interfere, within any State, with the domestic institutions thereof, including that of persons held to labor or service by the laws of said State.