The focus is on the nature and significance of media logic and an ecology of communication for a theory of mediation and for understanding and investigating political communication. Media logic is defined as a form of communication, and the process through which media transmit and communicate information. The logic and guidelines become taken for granted, often institutionalized, and inform social interaction. A basic principle is that media, information technologies, and communication formats can affect events and social activities. An overview of media logic, including correcting some unfortunate misinterpretations, is followed by discussion of attempts at clarification and revision (e.g., mediatization, mediality, mediatric, etc.), along with uses, relevance, and applications for political communication with various media (e.g., television, Internet, social media).