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This literary device is seen here in Obama's speech excerpt. This is not only a structural or sound device technique used in writing, but used as a rhetorical strategy as well.
My fellow citizens: I stand here today humbled by the task before us, grateful for the trust you have bestowed, mindful of the sacrifices borne by our ancestors.
Homes have been lost, jobs shed, businesses shattered.
Rather, it has been the risk-takers, the doers, the makers of things …
They saw America as bigger than the sum of our individual ambitions; greater than all the differences of birth or wealth or faction.
What is parallelism?