Before becoming known as an unusual breed of television correspondent and commentator, he had a long association with President Lyndon B. Johnson.

The television journalist and commentator Bill Moyers in 2011. He was once described as “a kind of secular evangelist.” Credit...Chad Batka for The New York Times

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By Janny Scott

Bill Moyers, who served as chief spokesman for President Lyndon B. Johnson during the American military buildup in Vietnam and then went on to a long and celebrated career as a broadcast journalist, returning repeatedly to the subject of the corruption of American democracy by money and power, died on Thursday in Manhattan. He was 91.