The present research aims at exploring one of the biggest aims the political speaker tries to arrive at, which is legitimization. The research starts with establishing the term legitimization by reviewing the researchers definition of it in political speech. Legitimization along with delegitimization which is a presentation of the self and the other, respectively, is being presented. After that an analysis of legitimization with its relation to assertion is being considered since legitimization is originally an assertion. The last component of the research tries to show how legitimization is used in anti-immigration speech which is one of the major concerns within political speech especially in countries that witness big waves of immigration. The research concluded that legitimization is one of the indirect goals of a political speaker which has been achieved through proximisation to arrive at the direct goal of gaining support of his audience.