The Church encourages the Christian faithful to promote or sustain a variety of apostolic undertakings but, nevertheless, prohibits any such undertaking from claiming the name Catholic without the consent of the competent ecclesiastical authority (see canon 216 of the 1983 Code of Canon Law). For some time, the Archdiocese of Detroit has been in communication with Mr. Michael Voris and his media partner at Real Catholic TV regarding their prominent use of the word “Catholic” in identifying and promoting their public activities disseminated from the enterprise’s production facility in Ferndale, Michigan. The Archdiocese has informed Mr. Voris and Real Catholic TV, RealCatholicTV.com, that it does not regard them as being authorized to use the word “Catholic” to identify or promote their public activities. Questions about this matter may be directed to the Archdiocese of Detroit, Department of Communications.
What about the "Catholic premier of Ontario" ? Perhaps Dalton McGuinty should seek permission from the proper ecclesial authorities, too.
Lots of interesting remarks in the comments section at Fr. Z's.