Planned Parenthood v. Casey (1992) is the Supreme Court case that upheld the core of Roe v. Wade but replaced its trimester framework with the "undue burden" standard, allowing more state abortion regulations. In AP Gov, it's the CED's illustrative example of how ideology drives social policy trends (Topic 4.10).
Planned Parenthood v. Casey was a 1992 Supreme Court case about Pennsylvania's Abortion Control Act, which required things like a 24-hour waiting period, informed consent, parental consent for minors, and spousal notification. The Court did something in between the two obvious options. It refused to overturn Roe v. Wade entirely, but it also threw out Roe's trimester framework and replaced it with a new test. Under the "undue burden" standard, a state regulation is unconstitutional only if it places a substantial obstacle in the path of someone seeking an abortion before fetal viability. Using that test, the Court upheld most of Pennsylvania's rules but struck down the spousal notification requirement.
For AP Gov, the case matters less for the abortion specifics and more for what it shows about ideology and the courts. Between Roe (1973) and Casey (1992), Republican presidents had appointed several more conservative justices, and the Court's new standard reflected that shift. It gave states (the level of government conservatives generally prefer for social issues) more room to regulate, without abandoning precedent altogether. The CED lists Casey as an illustrative example for exactly this point in Topic 4.10.
Casey lives in Unit 4 (American Political Ideologies and Beliefs), Topic 4.10 (Ideology and Social Policy). It directly supports two learning objectives. AP Gov 4.10.A asks you to explain how ideologies differ on the government's role in social issues, and Casey shows the conservative preference for state-level control in action because the "undue burden" test let states regulate more than Roe's framework did. AP Gov 4.10.B asks you to explain how ideology affects actual policy, and the CED names Casey as an illustrative example of how policy trends track the success of liberal or conservative perspectives. The big idea is that elections change which presidents appoint justices, justices change the Court's ideological balance, and the Court's rulings change what social policy states can enact. Casey is the clean, datable proof of that chain.
Keep studying AP® Gov Unit 4
Roe v. Wade and stare decisis (Units 2 & 4)
Casey is the rare case that honors precedent and rewrites it at the same time. The Court reaffirmed Roe's central holding (stare decisis in action, a Unit 2 judicial decision-making concept) while scrapping the trimester framework, which is why Casey shows up in questions about how courts balance precedent against ideological change.
Obergefell v. Hodges (Unit 4)
The CED pairs these as illustrative examples in 4.10 for opposite reasons. Casey shifted power toward state regulation of a social issue, while Obergefell (2015) imposed a single national rule on same-sex marriage. Together they show the Court can move social policy in either ideological direction.
Zelman v. Simmons-Harris and school vouchers (Unit 4)
Zelman (2002) is the other 4.10 illustrative example, where ideological fights over school vouchers got litigated just like abortion did in Casey. The pattern to notice is that when liberals and conservatives deadlock on a social issue, the battle often ends up in front of the Supreme Court.
Federalism and state policymaking (Unit 1)
The "undue burden" standard is basically a federalism dial. By loosening the national constitutional limit, Casey handed states more authority over a social issue, which is the conservative position on the national-versus-state question from Unit 1 applied to real policy.
Casey is an illustrative example in the CED, not one of the 15 required Supreme Court cases, so you won't be required to do a full SCOTUS comparison FRQ on it. But it shows up in multiple-choice stems and makes a strong example in Argument Essays about ideology and policy. Practice questions typically test four things. First, the "undue burden" standard itself and how it differs from Roe's trimester framework. Second, which Pennsylvania provision the Court struck down (spousal notification) versus what it upheld. Third, what the decision illustrates about judicial decision-making, since keeping Roe's core while changing its framework is a classic stare decisis example. Fourth, how the Court's changing ideological composition between 1973 and 1992 explains the shift. If you can connect "new conservative appointees" to "more deference to state regulation," you've got the 4.10.B move the exam rewards.
Roe established a constitutional right to abortion using a trimester framework that sharply limited state regulation, especially in the first trimester. Casey kept Roe's central holding (states can't ban abortion before viability) but ditched the trimester framework for the "undue burden" test, which let states pass regulations like waiting periods and parental consent. Quick check for the exam. Roe created the right, Casey weakened the protections around it without erasing it. Neither case is on the required AP Gov case list.
Planned Parenthood v. Casey (1992) upheld the core holding of Roe v. Wade but replaced the trimester framework with the "undue burden" standard.
Under the undue burden test, the Court upheld Pennsylvania's 24-hour waiting period and parental consent rules but struck down the spousal notification requirement.
The CED uses Casey in Topic 4.10 as an illustrative example of how ideology affects social policy, since a more conservative Court gave states more regulatory power.
Casey shows the chain from elections to policy because presidential appointments shifted the Court's ideology between 1973 and 1992, which changed the constitutional rules states operated under.
Casey is a go-to example of stare decisis, since the Court preserved precedent's core while modifying how it applied.
Casey is an illustrative example, not one of the 15 required Supreme Court cases, so use it as supporting evidence rather than expecting a required-case FRQ on it.
In 1992 the Supreme Court upheld the core of Roe v. Wade (no state bans on pre-viability abortion) but replaced Roe's trimester framework with the "undue burden" standard. It upheld most of Pennsylvania's Abortion Control Act but struck down the spousal notification provision.
No. Casey explicitly reaffirmed Roe's central holding while weakening its framework, which is why it's a classic stare decisis example. Roe and Casey were both later overturned by Dobbs v. Jackson Women's Health Organization in 2022, but for AP Gov, Casey's value is what it illustrates about ideology and policy in 1992.
It's the test Casey created, where a state abortion regulation is unconstitutional only if it places a substantial obstacle in the path of someone seeking a pre-viability abortion. It replaced Roe's stricter trimester framework and gave states significantly more room to regulate.
No. The CED lists it only as an illustrative example for Topic 4.10 (Ideology and Social Policy). You won't get a required SCOTUS comparison FRQ on it, but it works well as evidence in MCQs and Argument Essays about ideology, the courts, and federalism.
Both are CED examples in Topic 4.10, but they pushed policy in opposite directions. Casey (1992) expanded state authority over a social issue, reflecting conservative success on the Court, while Obergefell (2015) imposed one national rule legalizing same-sex marriage, overriding differing state requirements.
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