Yes, but you do know that that is already a thing right ?
This is basic democracy... surely...
This is a right in the Constitution, technically, The North had no right to stop the Confederate States from leaving the Union.
As long as it's not over enslaving others like the South leaving so they could keep enslaving African-Americans. In that case I think Republicans and Lincoln were justified in opposing it just to stop Democrats from destroying the rights of African-Americans.