This MA thesis deals with the relationship between language and politics. Language is the primary human means of communication. It is also incorporated in social relations, which is where power relations and politics come into question. The main premise of this MA thesis, which was presented in its theoretical part, was that the language used by politicians in their political speeches is not only a means of political agenda, but also a result of it, i.e. that there is a close relation between politicians’ linguistic choices and their desired impacts. To prove the thesis of the theoretical part of this paper, a corpus of twenty political speeches (ten given by George W. Bush and ten by Barack Obama) was analyzed in order to identify and examine the rhetorical devices used by politicians in general, and George W. Bush and Barack Obama, respectively. The results of the analyses have shown that their linguistic choices were highly related to their desired power relations, as well as with the policies which these politicians promoted.