McGuire served for several years as chaplain of the Universal Negro Improvement Association and African Communities League (UNIA), founded and led by Marcus Garvey.
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The others were Archbishop Peter Paul Brennan of the African Orthodox Church and the Ecumenical Catholic Diocese of the Americas, who according to one website was first consecrated a bishop on June 10, 1978, and subsequently reconsecrated in October 1979 and twice more in March 1987; Archbishop Patrick E. Trujillo of the Old Catholic Church in America and Archbishop Joseph J. Gouthro of Las Vegas, presiding bishop of the Catholic Apostolic Church International (CACI).