Answer: True
Step-by-step explanation:
President Johnson had repeatedly clashed with Congress on the way forward with regards to the treatment of the newly freed African Americans and one such result was the passage of the Tenure of Office Act.
Under this Act, the President could not terminate the employment of a cabinet member unless approved by Congress. Johnson had been clashing with his Secretary of War, Edwin M. Stanton, who was liked by the Republicans who controlled Congress.
When the Johnson suspended Stanton without telling Congress they had him impeached for violating the Tenure of Office Act.