Robert H. Bork, a former solicitor general, federal judge and conservative legal theorist whose 1987 nomination to the United States Supreme Court was rejected by the Senate in a historic political battle whose impact is still being felt, died on Wednesday in Arlington, Va. He was 85.

His death, of complications of heart disease, was confirmed by his son Robert Jr.

Judge Bork, who was senior judicial adviser this year to Mitt Romney’s presidential campaign, played a small but crucial role in the Watergate crisis as the solicitor general under President Richard M. Nixon. He carried out orders to fire a special prosecutor in what became known as “the Saturday Night Massacre.” He also handed down notable decisions from the federal appeals court bench. But it was as a symbol of the nation’s culture wars that Judge Bork made his name....