WASHINGTON — In 1973, in Roe v. Wade, the Supreme Court drew a line. The Constitution, it said, did not allow states to ban abortions before the fetus could survive outside the womb.
On Wednesday, when the court hears the most important abortion case in a generation, a central question will be whether the court’s conservative majority is prepared to erase that line. The case concerns a Mississippi law that bans most abortions after 15 weeks, long before fetal viability.
The court could overrule Roe entirely, allowing states to ban abortions at any point. But at least some justices may want to find a way to sustain the Mississippi law without overturning Roe in so many words, requiring them to discard the viability line and replace it with another standard that would allow a cutoff at 15 weeks.
Lawyers for Mississippi, who mostly argued that there is no constitutional justification for any line at all, did propose two backup arguments. They said the court could revise another existing standard, one prohibiting an “undue burden” on the right to abortion, to allow the 15-week cutoff by focusing on the fact that a substantial majority of abortions take place by then. Or, the lawyers wrote, the court could simply uphold the Mississippi law and leave for another day the knotty problem of drawing a new line.