At other times, he has called for restraint. During his 2005 confirmation hearings, he said the Supreme Court should be wary of overturning decisions, in part because doing so threatens the court’s legitimacy.
“It is a jolt to the legal system when you overrule a precedent,” he said. “Precedent plays an important role in promoting stability and evenhandedness.”
Chief Justice Roberts elaborated on the power of precedent in a concurring opinion in 2010 in the Citizens United decision, which overruled two rulings. Departures from precedent, he wrote, require very good reasons.
But he added, quoting from earlier decisions, that the Supreme Court remained free to correct its worst errors.
“Stare decisis is neither an ‘inexorable command’ nor ‘a mechanical formula of adherence to the latest decision,’ especially in constitutional cases,” he wrote, referring to the Latin legal shorthand for respect for precedent. “If it were, segregation would be legal, minimum wage laws would be unconstitutional, and the government could wiretap ordinary criminal suspects without first obtaining warrants.”
Richard W. Garnett, a law professor at Notre Dame, said the constitutional confrontation over the right to abortion sought by the sponsors of the Alabama law was unlikely to come to pass.
“It appears that the proposal’s supporters intend to create an opportunity for the current court to revisit its decisions creating that right,” he said. “However, it is not clear that the current justices who have expressed doubts about the correctness of decisions like Roe and Casey will want to take up a case that squarely presents the question whether these decisions should be overruled. Instead, they might well prefer to first consider less sweeping abortion regulations and to uphold them even under the current doctrine.”