How did this democratic victory to undermine congress efforts to help the freedmen?

The democratic victory, particularly following the Civil War and during Reconstruction, resulted in the dismantling of policies aimed at supporting freedmen, such as the Freedmen's Bureau. Democrats sought to undermine Congress's efforts by promoting segregationist laws and enforcing Jim Crow policies that restricted the rights of African Americans. This shift in power allowed them to roll back civil rights advancements and reinforce systemic racism, effectively negating many of the protections intended for freedmen. Consequently, the push for equality and integration was significantly hindered, leading to decades of disenfranchisement.