The bottom line: "Four states — Louisiana, Mississippi and North and South Dakota — have laws designed to ban abortion if Roe is overturned. And seven — Arkansas, Kansas, Kentucky, Louisiana, Missouri, Ohio and North Dakota — have laws that express the intention to limit abortion as much as the Supreme Court allows."

What to watch: If Trump stays true to his word and appoints a pro-life judge to succeed Justice Kennedy, the issue of abortion would be catapulted to the forefront of state political campaigns. Patrick Egan, a political scientist at New York University, told Halper, "The extent to which states prohibit or make it more difficult to access legal abortion could become the battleground in the politics of many states for decades to come."