What brought the Radical and moderate Republicans together in an alliance against President Johnson?:
A the president's vetoes of the Freedmen's Bureau bill and the Civil Rights Act of 1866.
B realization by congressional Republicans that Johnson was delaying readmission of the former Confederate states.
C the president's proposal for an agency that would provide relief, rations, and medical care for impoverished southerners.
D a desire to send a message to northern Democrats that they could work together to rebuild the South.