On the rhetorical ethos construction of Barrack Obama

Since Barrack Obama became the first American black president in history,people have showed great interest in his success.In the Western world with the long-standing rhetoric tradition,Obama is also an expert in this field.Knowing the rhetoric tactics and using the rhetorical resources available,he achieved his rhetoric purpose.By using the theory of rhetorical ethos,this paper is intended to probe into Obama's process of winning over the voters by constructing rhetorical ethos,establishing authority,enhancing persuasion and influence of words.