Answer:
The bill is taken back to congress and can be taken to the president until they allow it to pass as a law.
The power to regulate interstate commerce is a power that is exclusively given to the American Government by the U.S. Constitution. The regulation of interstate commerce was a major issue during the times of the Articles of Confederation and was therefore an issue with the Constitutional Framers were sure to create in the new Constitution.
Structure is meant to keep the government in line. Depending on the different types of government, the structure will be different as well.
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