Earl Warren (March 19, 1891– July 9, 1974) was the 14th Chief Justice of the United States and the only person elected Governor of California three times. Before holding these positions, Warren served as a district attorney for Alameda County, California and Attorney General of California.
His tenure as California governor and Chief Justice was marked by extreme contrast. As governor of California, Warren was very popular across party lines, so much so that in the 1946 gubernatorial election he won the nominations of the Democratic, Progressive, and Republican parties. His tenure as Chief Justice was as divisive as his governorship was unifying. Liberals generally hailed the landmark rulings issued by the Warren Court which affected, among other things, the legal status of racial segregation, civil rights, separation of church and state, and police arrest procedure in the United States. But conservatives decried the Court's rulings, particularly in areas affecting criminal proceedings. In the years that followed, the Warren Court became recognized as a high point in the use of judicial power in the effort to effect social progress in the United States. Warren himself became widely regarded as one of the most influential Supreme Court justices in the history of the United States and perhaps the single most important jurist of the 20th century.
In addition to the constitutional offices he held, Warren was also the vice-presidential nominee of the Republican Party in 1948, and chaired the Warren Commission, which was formed to investigate the 1963 assassination of President John F. Kennedy.