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The relation between language and ideology is dialectic: language and the use of language reflect ideology on the one hand and act upon ideology on the other hand. Some ideologies are naturalized and people are not consciously aware of them. A study of language can possibly remove the cover of ideology to find out the underlying power in a society due to the dialectic relation.This article deals with discourse analysis of political text, which is normally ideology-ridden, through an analysis of one of Bush’s speeches. It follows Fairclough’s three-dimensional framework. It attempts to interpret the linguistic features and goes on to explain those prominent features from the social perspective after a thorough textual analysis with the linguistic instrument loaned from Halliday’s Functional Grammar.Ideologies are invested in various levels in a political discourse. There are the use of charged words, the selection of processes and the adoption of nominalization in terms of Experiential aspect; there are application of declarative clause, modal operators, tense and especially personal pronouns in terms of Interpersonal aspect; and in terms of Textual aspect, the means of forgrounding is outstanding. All the linguistic features in the political speech have served the purpose of the speaker.