This research investigates the use of modality and the reflection of ideology in political discourse. It employed a qualitative approach. The data sources are two campaign speeches delivered by Donald Trump in Butler, Pennsylvania on October 5, 2024, and Phoenix, Arizona on July 24, 2024. These speeches are analyzed in terms of types (modalization and modulation) and values (high, median, and low) of modality. The analysis uses Halliday and Mathiessen’s (2014) theory of modality and is supported by Van Dijk’s (1998) theory of ideology. The findings reveal the use of modality to highlight ideologies in Butler is nationalism that has three aspects, such as anti-immigration, economic nationalism, and identity politics, and in Phoenix is anti-elitism that has three aspects distrust of political leaders, blaming the media and institutions and election system. High obigation and inclination are often used to show strong commitment, while medium and low values reflect uncertainty or attempt to persuade. The results show that modality is not only used to express personal stance but also to build political identity and influence public opinion. This study enhances the understanding of how language, especially modality, can be used to reflect ideology in political speeches.