Lewis died in his Cambridge, Mass., home from complications of renal and heart failure, according to his wife, Margaret H. Marshall.
Lewis worked at the Times for 32 years where he used his column to champion liberal causes, such as human rights and free speech. He won his first Pulitzer in 1955 after defending a Navy civilian who was falsely accused of being a communist sympathizer. His second came in 1963 for his reporting on the Supreme Court.
The journalist also wrote the critically acclaimed 1964 book Gideon's Trumpet, which was adapted into a television movie starring Henry Fonda.