Explain how the impeachment of Andrew Johnson is an example of the arguments about reunification of the US after the Civil War.

Explanation:

Congressional Reconstruction did not seem to be affected adversely by Johnson's acquittal. Most of the new state governments in the South were controlled by Republicans, the Fifteenth Amendment was passed and ratified, and blacks were elected to federal, state, and local offices. President Johnson was impeached by the House of Representatives. The House charged Johnson with violating the Tenure of Office Act. The alleged violation stemmed from Johnson's decision to remove Secretary of War Edwin Stanton, a prominent Radical Republican leftover from the Lincoln Cabinet

tearing down the berlin wall.