How did white Southerners response to the Freedmen's Bureau provided obstacles for former slaves?

The Freedmen's Bureau was established in March of 1865 to help freed people achieve economic stability and secure political freedoms. Many white Southerners, as well as President Andrew Johnson, challenged the Bureau's legitimacy, sparking racial violence in the South and the ultimate failure of the Bureau.

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.