If the border with Laos had been closed and North Vietnam had not been able to operate in the country, the communist side would not have been able to stock up on resources, men, ammunition, weapons, food and medicine through the HoChi Minh Trail.
Therefore, the forces of the North that were fighting in South Vietnam would have been out of supply, and their defeat would have been imminent.
Hamilton thought that the Constitution's Article I Section 8, which grants the Congress the ability to enact laws that are appropriate and necessary for the government, gave Congress the authority to establish a national bank.
James Madison, a representative from Virginia, and Secretary of State Thomas Jefferson disagreed, arguing that the states owned any authority that the Constitution did not expressly provide to Congress. Nevertheless, the bank measure easily passed the House with a vote of 39 to 20, and on February 25, 1791, President George Washington signed it into law. Congress allowed the bank's charter to expire 20 years later. Representative James Madison of Virginia fought for the Constitution's Bill of Rights while he was serving in the House.
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B: the protection and spread of slavery