What impact would the Great Migration have on the cities that saw growth?
Please list one positive and one negative

Effects of the Great Migration. African Americans had been leaving the South in profound quantities since the Emancipation Proclamation. However the numbers heading north increased dramatically during the onset of the twentieth century. In 1910, blacks in America lived in overwhelmingly rural areas, having not experienced life in a big city such as Chicago.

Explanation:

a system of cooperative federalism emerged, as the powers of the federal government expanded.