Harsch made his first broadcasts during the time he was in Berlin as bureau chief for the
Christian Science Monitor, filling in sporadically for
William L. Shirer who was the noted Berlin correspondent for
CBS. After Harsch returned to the United States, he joined CBS in 1943. For the next six years Harsch broadcast his news analysis on WTOP, Washington D.C. in addition to writing a column for the
Monitor. Because of his background in London, Harsch was hired by the BBC when influential broadcaster
Raymond Gram Swing gave up his post with the weekly radio program
American Commentary. Harsch alternated his coverage from Washington with
Clifton Utley, who reported from Chicago. In 1953, Harsch shifted his allegiance to
NBC, serving as a news analyst for four years before returning to London as the senior European correspondent for the network. He became so well known in London circles that he was invited to dine with the Queen, was a popular member of the
Garrick Club and many other social fixtures. When he left England, he was made a
Commander of the Order of the British Empire by Queen Elizabeth II.
ABC became his broadcast home in 1967, when he was a commentator for the network until 1971, assigned to the American Entertainment Network effective 1/1/68. During the course of his broadcasting career, he continued to write his newspaper column, and his efforts for the
Monitor that helped establish its reputation in foreign affairs coverage were celebrated in 1989 on the 60th anniversary of his column. ==Personal life==