Analysis Construction of Argumentation in Presidential Debate at FortyFourth American Election (Barack Obama and Jhon Mccain).

An argumentation is consedered as practical of a discourse. Thus, it is the product of the hierarchical, situated sequence of utterance, indexical, propositional and illocutionary acts carried out in pursuit of some communicative goal. As the objective, an argumentation engages with language use and function. It works in how language applies in certain circumstance and pattern of language use raised in certain purpose. Since argumentation may be practised as writen and spoken discourse, researcher focus on spoken argumentetion costruction which occured in American Presidential Debate Fourty-forth on this research. Therefore, the purpose of the research to discribe about construction of argumentation, which functions of argument are applied and sructures of the argument fuction created during the debate. The result of the research shows that those argument functions - raised in Stephant Toulmin’s Argumentation model -are not always occured in an argumentation. hence, the stucture of an argumentation in the debate may be constructed by claim function and warrant function at least. Furthemore, warrant function occured mostly in the argumentaion. As spoken argumentation (debate) which is created spontaniously, warrant fuction become important because it is "common ground" of speaker and hearer.