Final answer:
Reconstruction came to an end when national attention shifted away from integrating former slaves, white Democrats regained power in southern politics, and federal troops were withdrawn from the South.
Step-by-step explanation:
Reconstruction ended when national attention shifted away from the integration of former slaves as equal citizens, and white Democrats regained power in southern politics. Between 1868 and 1877, national interest in Reconstruction declined as economic issues took precedence. The threatened Republican power in the South was also a factor, as violence and intimidation by white conservatives posed a significant challenge. Reconstruction ultimately ended with the controversial Presidential election of 1876 when Rutherford B. Hayes became president in exchange for the withdrawal of federal troops from the South.