Carlo Maria Viganò (born 16 January 1941) is an archbishop of the Catholic Church who served as the Apostolic Nuncio to the United States from 19 October 2011 to 12 April 2016. He previously served as Secretary-General of the Governorate of Vatican City State from 16 July 2009 to 3 September 2011. He is best known for having publicized two major Vatican scandals. These were the Vatican leaks scandal of 2012, in which he revealed financial corruption in the Vatican, and a 2018 letter in which he accused Pope Francis and other church leaders of covering up sexual abuse allegations against former cardinal Theodore McCarrick. — Wikipedia