Please cite:
1. Clause in Constitution where this is stated and/or
2. Supreme Court decision that rendered this opinion.
It's funny how you post this unsubstantiated bullshit line of reasoning, and then explain how the federal government has the power to regulate airplane traffic and motor fuel taxes. WHA??? My copy of the Constitution doesn't say jack shit about airplanes or motor fuel taxes. Therefore, the FAA is "unconstitutional" by your reasoning, right?
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