But it included slaves. That's the point.
The USA Constitution - the one Lincoln twice swore to defend - mentioned slavery THREE times. Or more accurately, it provided for slavery.
How did that happen?
Like this: the states of New York, New Hampshire, New Jersey, Massachusetts, Rhode Island, Connecticut, Pennsylvania, Delaware, and Maryland voted to include slavery in the USA Constitution. Oh yes, let's don't forget that Virginia, North and South Carolina, and Georgia also voted to include slavery in the USA Constitution.
In defense of northern sensibilities, only 9 of the 13 states that voted for slavery were in the north.
Ha, ha, ha. That's so funny, I forgot to laugh. You are now doubling down on your double-speak. Now you have moved from "the northern States included slavery" to the northern states voted for slavery. Please reread post #61. For your edification, in 1783, Massachusetts Supreme Judicial Court ruled slavery unconstitutional, a decision based on the 1780 Massachusetts constitution. All slaves were immediately freed. I will leave it up to you to figure out how you then overextend yourself to come up with Massachusetts voting for slavery in the Constitution in 1787.