The study sought to analyze the communicative functions of metaphors in Selected political speeches of Mr. John Dramani Mahama. Critical Metaphor Analysis (CMA) developed by Jonathan Charteris-Black as an approach solely for the analysis of metaphors in political discourse was adopted as a theoretical framework for the study. The study is rooted in a qualitative research approach and grounded in textual analysis as the design. The sampling method adopted in the study was purposive, and the analysis was done in line with the research question posed. The study has shown that language plays a crucial role in human existence as a means of communicating world events. The study has also revealed that in Critical Discourse Analysis, metaphor is conceived as speech actions which build together to create coherent social interactions. This study has indicated that metaphor is a cognitive phenomenon other than a purely lexical one. The study concludes that metaphor is a deep-seated conceptual phenomenon that shapes the way we think (and not just the way we speak). Working inductively from the bottom up with a metaphor, CDA has been able to reveal a rich body of facts about discourse and demonstrate that CDA follows an elaborate, but systematic, set of rules or architecture. It is recommended that future studies could explore the possibility of quantifying the frequency of the occurrence of metaphors and known end results to find out whether there is a correlation between the number of metaphors and persuasion. It is also recommended that research could also be carried out into Ghanaian politics as a discourse community with a view to unearthing language basically associated with that vocation. A study could also be conducted into the use of other rhetorical/oratorical devices, e.g. the politicians’ use of analogy in their speeches.