[Non-Sequitur]

The Confederacy was creating another more perfect union - their Constitution added term limits, corrected the voting irregularities of Senators, inclued a line-item veto, the prohibition of protectionist tarrifs or regulations, prohibited payment of cost overruns, eliminated pork-barrel riders to bills, etc.

Protected slavery from government intervention or threat of elimination, safeguarded slave imports, made it harder to amend the constitution, etc.

[Centurion2000]

Protected slavery from government intervention or threat of elimination, safeguarded slave imports

If this was that big a worry, the economics of slavery would have killed it in a couple of decades with everyone realizing that it was more cost effective to pay them than to keep them slave.

[DBtoo]

Safe-guarded slave imports?

From "America! A Concise History" by Rorabaugh and Critchlow:

"...Another compromise provision gave Congress the right to abolish the African slave trade in 1808. In fact, few new slaves entered the United States after 1787, every state except South Carolina banned the overseas trade, and Congress did abolish this trade in 1808."