Roe established abortion rights. 20 years later, Casey paved the way for restrictions

Nate Darnell holds a cross while surrounded by chanting abortion-rights demonstrators outside the U.S. Supreme Court on May 5, 2022 in Washington, D.C. (Tom Brenner / Getty Images)

In Justice Samuel Alito's leaked draft opinion that was published Monday night, the Supreme Court seems poised to roll back the 1973 Roe v. Wade decision, which established the right to an abortion.

Along with it, another case on abortion will also be affected: Planned Parenthood of Southeastern Pennsylvania v. Casey. The 5-4 decision upheld Roe in 1992, but paved the way for more restrictions on abortion access because it declared that restrictions were allowed as long as there was not an "undue burden." It was the first time the court set a new standard on validity of certain laws that restricted abortions.