The Elastic Clause
This video presents the same text shown beside it, spoken and on screen. It adds nothing the text does not say.
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The elastic clause — Article I, Section 8, Clause 18 — empowers Congress to make laws necessary and proper for carrying out its constitutional responsibilities.
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A national bank appears nowhere on the list; the clause supplied authority to charter one.
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Open construction stretches national authority beyond the list — hence "elastic."