Although it's only one case, here's an NPR interview (http://www.npr.org/2015/03/10/392142452/florida-gov-scott-denies-banning-phrase-climate-change http://www.

Although it's only one case, here's an NPR interview (http://www.npr.org/2015/03/10/392142452/florida-gov-scott-denies-banning-phrase-climate-change http://www.npr.org/2015/03/10/392142452/florida-gov-scott-de...) discussing the governor of Florida's policy to avoid the term 'climate change'. Not sure if denying usage of the term is equivalent to denying its existence, but hopefully it's something.