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Related to all this, of course, is the issue of impoundment, that is, the holding of unspent appropriated funds. It is something done by presidents as a form of “executive veto.” It was first used by Thomas Jefferson. There is no provision in the Constitution on the subject. The concept has come up in local jurisprudence, but the Supreme Court has heretofore refrained from passing judgment on its constitutionality.
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