Why was reconstruction important?
a. the government needed to find a way to reunite the country.
b. abolitionists believed slavery needed to be over.
c. the south needed to be punished for leaving the union.
d. the north needed to get something for winning the war.

in mcculloch v. maryland (1819) the supreme court ruled that congress had implied powers under the necessary and proper clause of article i, section 8 of the constitution to create the second bank of the united states and that the state of maryland lacked the power to tax the bank.

gibbons v. ogden, (1824), was a landmark decision in which the supreme court of the united states held that the power to regulate interstate commerce, granted to congress by the commerce clause of the united states constitution, encompassed the power to regulate navigation.