Final answer:
President Obama's persuasive speech techniques include powerful and unifying word choice, relatable historical examples, and accessible language, along with leveraging the 'bully pulpit' for enhanced influence.
Step-by-step explanation:
President Obama utilized various rhetorical techniques to build his arguments and make his speeches persuasive. Techniques such as powerful, passionate word choice and word choice that inspires unity were often employed to resonate with and galvanize audiences. Moreover, he chose commonly understood language to ensure his message was accessible to a broad audience. By incorporating memorable examples from history and drawing on his personal experiences, such as examples from his work in Illinois, President Obama grounded his speeches in relatable narratives that encouraged engagement and support. Additionally, the use of the 'bully pulpit' allowed him to leverage presidential prestige when delivering speeches, which further enhanced his persuasive impact.