Final answer:
George W. Bush employed emotional appeal at Ground Zero and authoritative justifications in Congress to rally support for the war on terror and the Iraq invasion, utilizing strategic rhetoric to influence public sentiment.
Step-by-step explanation:
President George W. Bush used a range of rhetorical choices in his speeches following the 9/11 attacks, including the pathos-driven bullhorn speech at Ground Zero and the more formal address to Congress on declaring a war on terror. In the Ground Zero speech, Bush created a connection with his audience through the immediate, visceral backdrop of the attacks' aftermath, portraying resilience and the collective desire for justice. Later, in the address to Congress, his rhetoric incorporated elements of ethos and logos, through authoritative stances on national defense and justifications for pre-emptive warfare that constituted the Bush Doctrine. Furthermore, by evoking images of future threats and connecting Iraq to terrorism without solid evidence, his rhetoric played upon fear and the collective memory of 9/11 to garner support for the invasion of Iraq. This approach capitalized on the nation's heightened emotions and desire for security, demonstrating a strategic use of rhetoric to align public sentiment with policy objectives.