In the passage from Representative Barbara Jordan's remarks on impeachment, the rhetorical techniques demonstrated are:
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Metaphor - The phrase "abandoned to a 20th-century paper shredder" serves as a metaphor that implies the Constitution would be thrown away or discarded if it does not address serious offenses.
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Rhetorical conditional - The structure of the statement implies a conditional scenario: "If the impeachment provision... will not reach the offenses charged here..." which indicates a hypothetical situation leading to a strong conclusion.
So the correct answers are metaphor and rhetorical conditional.