Answer:
Necessary and Proper Clause.
Step-by-step explanation:
Quote Article I, Section 8, Clause 18: [The Congress shall have Power...] to make all Laws which shall be necessary and proper for carrying into Execution the foregoing Powers, and all other Powers vested by this Constitution in the government of the United States, or any Department or Officer thereof." [Emphasis added].
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The Supremacy Clause establishes that the Constitution is "the supreme law of the land", and that if there are conflicts of interests with future laws, that the Constitution will take priority.
The Due Process Clause establishes that the government cannot casually take away the natural rights of a citizen unless authorized by the law. Essentially, the citizen would only relinquish their rights to life, liberty, and property if they willingly break laws set by the US government.
The Expressed Powers Clause establishes the rights given to Congress, which includes the power to create taxes for citizens, and to conduct foreign relations, such as treaties, maintenance of a military for foreign affairs, and regulation on foreign trade.
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