Which was the purpose of the “double v” campaign

The purpose of  the "Double V" campaign is to fight racism at home and abroad. The Double V campaign  was a movement by African Americans demanding equal rights in exchange for the sacrifices that they made in the war. Hope this answer helps.

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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.

(d) take jobs from american workers.