supreme court 1993 Published May 31, 2012 at 600 × 474 in 20 Years Since Planned Parenthood v. Casey The U.S. Supreme Court, presided over by William Rehnquist, decided Planned Parenthood v. Casey 20 years ago today. The U.S. Supreme Court, presided over by William Rehnquist, decided Planned Parenthood v. Casey 20 years ago today.