The north.
“The north.”
That is an interesting comment.
Slavery in the United States was not just constitutional; it was enshrined in the United States Constitution.
If the North was fighting to overthrow slavery with violence as you and others contend, then the North was fighting to violently overthrow the United States Constitution.
At the time of the war, the South claimed the North was fighting against the Constitution. Your claim adds credibility to their view and justifies secession.
The most accurate answer to libtard demojeff's red herring of a question is "The North went to war to save the Union and eventually added freeing the slaves as a mission parameter". Please allow me to spare you the nuisance of having to bother with him.
Yes, slavery was an affliction that predates the formation of our nation. No, slavery is not "enshrined" in the US Constitution. There is only an oblique reference to "Person held to Service or Labour". No, the North was not fighting to violently overthrow the United States Constitution. To suggest so is utterly moronic.
Cheers!