His reporting of McCarthyism brought him into conflict with Joe McCarthy and his wife 's visa was cancelled .
Following World War II , Walker returned to the Herald and was posted to the United States of America where he worked with Reuters - Australian Associated Press .
Walker 's reporting of McCarthyism brought him into conflict with Joe McCarthy and his wife 's visa was cancelled .
Following World War II , Walker returned to the Herald and was posted to the United States of America where he worked with Reuters - Australian Associated Press .