What do modern scholars view as President Johnson's most serious and indictable offense?

A) His decision to fire Secretary of War Stanton
B) His losing battle with alcoholism
C) His advice to Southern states that they reject the Fourteenth Amendment
D) His systematic efforts to block enforcement of the Reconstruction Act of 1867

Modern scholars view Johnson's systematic efforts to block enforcement of the Reconstruction Act of 1867 as his most serious and indictable offense. This act was passed to guarantee civil rights and suffrage to Black Americans and to place Southern states under military control until they ratified the Fourteenth Amendment. Johnson's efforts to block enforcement were seen as undermining the Reconstruction effort and perpetuating racial inequality. While his decision to fire Secretary of War Stanton played a role in his impeachment, it was not viewed as his most serious offense. His battle with alcoholism and advice to Southern states were also not seen as serious enough grounds for impeachment.