What is the highest legal authority in United States government

might be agreeing to participate ethically with other european nations in the slave trade

or notifying other european nations when taking possession   of african territories

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.

it affected it because the kingdoms (with trade) slowly got richer and richer.