Final answer:
The most pressing need for the new government of the US was a source of revenue to address financial difficulties after the Revolutionary War.
Step-by-step explanation:
The most pressing need for the new government of the US was a source of revenue. After the Revolutionary War, the government faced financial difficulties and needed a way to generate income to pay off war debts and fund its operations. To address this need, the government implemented various measures such as tariffs and taxes, including the Whiskey Act of 1791, to generate revenue.
Learn more about the pressing need for a source of revenue in the new government