SCOTUS ruled a slave was 3/5ths a human being, so be happy anyone who waves SCOTUS decisions around. There was a war fought over this; 500,000 people died, well, at least partially over it, depending on how one sees it.
You have states with only one abortion clinic so to arrogantly tell others it will always be legal; is really an ignorant-of-the-facts statement, it's close to a reality.