Chief Justice Rehnquist wrote the opinion of the Court for all but Parts II-D and III; however, only Justices White and Kennedy joined that opinion in its entirety. In discussing the fetal viability section, the plurality asserted that the right to abortion was a "liberty interest protected by the Due Process clause" subject to restriction by any laws which would permissibly further a rational state interest such as protecting potential life. The plurality said that this would require the court to "modify and narrow "Roe" and succeeding cases."