Ali 'paved the way for Obama'published at 06:39 British Summer Time 4 June 2016
More from boxing promoter Frank Warren: "What he did for his own race - being a black American - he stood up against the war in Vietnam to the detriment of his career and his life.
"I think at the time he was out of the ring for three years and was sentenced to five years in prison, which he appealed. To do that shows how strong his belief was.
"He probably paved the way for (Barack) Obama to be the president of America."