Exactly correct.
Southerners had controlled the federal government for decades. When the election of a man Like Lincoln -- always an opponent of slavery -- showed that control slipping, they tried to bolt.
Walt
"I understand a proposed amendment to the Constitution—which amendment, however, I have not seen—has passed Congress, to the effect that the Federal Government shall never interfere with the domestic institutions of the States, including that of persons held to service. To avoid misconstruction of what I have said, I depart from my purpose not to speak of particular amendments so far as to say that, holding such a provision to now be implied constitutional law, I have no objection to its being made express and irrevocable." - Abraham Lincoln speaking a the Inauguration of the 16th President of the United States, March 4, 1861
"Mr. Corwin's amendment to the Constitution prohibiting Congress from interfering with Slavery in the States finally prevailed by the bare Constitutional majority. It is known that Mr. Lincoln favored its passage" - New York Tribune, March 5, 1861
"Mr. Lincoln has advised that the Republicans of his State should support Mr. Corwin's constitutional amendment...prohibiting Congress from interfering with the domestic institutions of the South." - New York Tribune, March 2, 1861
The amendment to which Lincoln was referring and gave his support:
Article Thirteen. "No amendment shall be made to the Constitution which will authorize or give to Congress the 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."
Sounds like a real slavery opponent to me!