When Earl Warren became chief justice of the Supreme Court in 1953, only one of the nine justices had served as a judge before joining the court. After the landmark court ruling the next year that ended segregation, court detractors masked their resentment of Brown v. Board of Education with a patina of legitimacy: They painted Warren, a former prosecutor and three-term governor from California, as the embodiment of an untrained politician masked in judicial robes.
Experienced judges adhering to well-established precedents, they asserted, would have never overruled Plessy v. Ferguson, the 1896 case establishing the "separate but equal" doctrine. Pointing to this lack of judicial experience as the reason for the justices' flawed decision-making, Senate Judiciary Committee Chairman James Eastland complained to Sen. Joe McCarthy: "We have politicians instead of lawyers on the court."
The insistence by rivals of the Warren court on appointing justices with judicial experience eventually became the norm. The record bears this out: All but one of the last 16 justices had been judges before their promotion to the high court.
The leading candidates President Joe Biden is reportedly considering for the opening created by Justice Stephen G. Breyer's pending retirement are all judges. By focusing on this narrow category, Biden may be forgoing an opportunity to select someone from outside the judiciary who can bring a brand of expertise that has been missing from the court for decades.
Dwight Eisenhower was the first Republican president to embrace the judges-only approach. Lamenting his selection of Warren, a decision he later deemed "the biggest damn fool thing I ever did," his next four appointments came from the judicial ranks as did two of Richard Nixon's four appointments. Since then, every justice appointed by a Republican president has arrived on the court with judicial credentials.
The Democrats who succeeded Eisenhower didn't follow suit at first.
John F. Kennedy's two appointments — Byron White and Arthur Goldberg — came from the executive branch. Lyndon B. Johnson's first pick, Abe Fortas, headed one of Washington's most prominent law firms. Thurgood Marshall, Johnson's second appointment, had briefly served as an appellate judge but was better known for successfully arguing Brown and other cases before the Supreme Court. Johnson actually urged Marshall to resign from the bench so he could serve as U.S. solicitor general — the government's lead lawyer before the high court — to polish Marshall's credentials in preparation for a nomination to the high bench.
After Johnson, however, Democratic presidents also selected nominees exclusively from the judiciary, with Elena Kagan as the sole outlier. She was solicitor general when she was nominated.