Planned Parenthood of Pennsylvania v. Casey (1992)

1. A finding of an undue burden is a shorthand for the conclusion that a state regulation has the purpose or effect of placing a substantial obstacle in the path of a woman seeking an abortion of a nonviable fetus. A statute with this purpose is invalid because the means chosen by the State to further the interest in potential life must be calculated to inform the woman's free choice, not hinder it. And a statute which, while furthering the interest in potential life or some other valid state interest, has the effect of placing a substantial obstacle in the path of a woman's choice cannot be considered a permissible means of serving its legitimate ends.

2. As with any medical procedure, the State may enact regulations to further the health or safety of a woman seeking an abortion. Unnecessary health regulations that have the purpose or effect of presenting a substantial obstacle to a woman seeking an abortion impose an undue burden on the right.

Whole Woman's Health v. Hellerstedt (2016)

1. The rule announced in Casey, however, requires that courts consider the burdens a law imposes on abortion access together with the benefits those laws confer.

2. The Fifth Circuit's standard of review may be read to imply that a district court should not consider the existence or nonexistence of medical benefits when deciding the undue burden question, but Casey requires courts to consider the burdens a law imposes on abortion access together with the benefits those laws confer.

June Medical Services v. Russo

Justice Breyer, plurality opinion:

We conclude, in light of the record, that the District Court’s significant factual findings—both as to burdens and as to benefits—have ample evidentiary support. None is “clearly erroneous.” Given the facts found, we must also uphold the District Court’s related factual and legal determinations. These include its determination that Louisiana’s law poses a “substantial obstacle” to women seeking an abortion; its determination that the law offers no significant health-related benefits; and its determination that the law consequently imposes an “undue burden” on a woman’s constitutional right to choose to have an abortion. We also agree with its ultimate legal conclusion that, in light of these findings and our precedents, Act 620 violates the Constitution.

Chief Justice Roberts, concurring opinion:

Stare decisis instructs us to treat like cases alike. The result in this case is controlled by our decision four years ago invalidating a nearly identical Texas law. The Louisiana law burdens women seeking previability abortions to the same extent as the Texas law, according to factual findings that are not clearly erroneous. For that reason, I concur in the judgment of the Court that the Louisiana law is unconstitutional.

Justice Gorsuch, dissenting opinion:

To arrive at today’s result, rules must be brushed aside and shortcuts taken. While the concurrence parts ways with the plurality at the last turn, the road both travel leads us to a strangely open space, unconstrained by many of the neutral principles that normally govern the judicial process. The temptation to proceed this direction, closer with each step toward an unobstructed exercise of will, may be always with us, a danger inherent in judicial review. But it is an impulse this Court normally strives mightily to resist. Today, in a highly politicized and contentious arena, we prove unwilling, or perhaps unable, to resist that temptation. Either way, respectfully, it is a sign we have lost our way.