Why did jefferson oppose the establishment of a national bank

Alexander Hamilton felt that the power to create a bank was granted by the "Elastic Clause" in the Constitution. Congress approved the creation of the national bank in 1791. Thomas Jefferson opposed the creation of the Bank of the United States because the Constitution did not specifically grant power to Congress to create one.

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to act quickly in times of danger to the united states

because you have to act quickly if you want to live/survive.