Probably the supreme court saying it was a state level issue. Some states would allow abortion, some would ban it and some would fall somewhere in between. It would still be devisive on the state level in some states.
Mind you, we are talking about going from a ten ton truck load of TNT level of divisiveness to maybe a potato sack full of TNT level of divisiveness on my patented "truck full of TNT to Taco Bell aftermath" level of divisiveness scale.