It was Bush v. Gore, which ended the Florida recount and decided the 2000 presidential election.
Looking back, O'Connor said, she isn't sure the high court should have taken the case.
"It took the case and decided it at a time when it was still a big election issue," O'Connor said during a talk Friday with the Tribune editorial board. "Maybe the court should have said, 'We're not going to take it, goodbye.'"
The case, she said, "stirred up the public" and "gave the court a less-than-perfect reputation."
"Obviously the court did reach a decision and thought it had to reach a decision," she said. "It turned out the election authorities in Florida hadn't done a real good job there and kind of messed it up. And probably the Supreme Court added to the problem at the end of the day."