Original sentence: After the North agreed to withdraw federal troops under the Compromise of 1877, white Democrats used a variety of tactics to reduce voting by African Americans and poor whites.In American politics, the Southern strategy is a Republican Party method of winning Southern states in the latter decades of the 20th century and first decade of the 21st century by exploiting opposition among the once segregationist South to the cultural upheaval of desegregation and the Civil Rights movement
Edited sentence: ", although not explaing how the Republican party can be a southern party only and that Democrats are able to win the South at the same time.After the North agreed to withdraw federal troops under the Compromise of 1877,  Democrats used a variety of tactics to reduce voting by African Americans and poor whites.In American politics, the Southern strategy is a Republican Party method of winning Southern states in the latter decades of the 20th century and first decade of the 21st century by exploiting opposition among the once segregationist South to the cultural upheaval of desegregation and the Civil Rights movement, although that was never openly a motto of the Southern Strategy and is speculation