ayumistachim45 ayumistachim45 03-12-2020 History contestada What significant event showed the conflict that existed between President Andrew Johnson and Congress? A Congress supported the black codes and President Johnson did not. B Congress passed the Civil Rights Act of 1866 over the President’s veto. C Congress ignored the ratification of the Thirteenth Amendment. D Congress denied African American's right to vote, President Johnson vetoed their legislation.