NEW YORK--(BUSINESS WIRE)--Fitch Ratings has downgraded the Commonwealth of Puerto Rico's general obligation (GO) and related debt ratings to 'CC' from 'B'. The ratings remain on Rating Watch Negative. The complete list of affected credits is included at the end of this release. The downgrade of the ratings to 'CC', which indicates Fitch's belief that default of some kind appears probable, is based on public comments by the governor supporting the broad debt restructuring strategy included in a