Answer:
The tenure of office act
Step-by-step explanation:
This law provided that the President of the Republic could not dismiss his Secretaries of State, appointed by a former president, without the Senate's authorization. On August 12, 1867, Andrew Johnson had not observed the tenure of office act and removed Lincoln's Secretary of War, Edwin Stanton. Stanton was an ally of the radicals. His departure was the breach used for the process to begin