Which of the following political issues significantly impacted the success of Reconstruction? Southerners, incensed by the federal government's interference, found ways to circumvent Reconstruction efforts. Southern Democrats finally agreed to work with the Radical Republicans, and they decided Reconstruction should end. States in the South began passing laws to protect the civil rights of African Americans, which made Reconstruction unnecessary. The impeachment of Johnson led to the creation of Black Codes, which made Reconstruction era laws irrelevant.