The argument is using Ethos. This is because the speaker references the character or stand of the American people with respect to the War in Afghanistan.
Ethos refers to the nature, character, culture, or characteristic spirit of an era or community.
Ethos is usually displayed or exhibited or manifested in attitudes and aspirations.
In the example above, the speaker seeks to persuade the people that he is with them in character by indicating that the war should have been handled differently.
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