Congress disapproved of the fact that without their approval president johnson suspended charles sumner. thaddeus stevens. robert e. lee. edwin stanton.

Congress disapproved of the fact that without their approval President Johnson suspended Edwin Stanton.

Explanation: President Andrew Johnson was impeached by the Congress after he removed Edwin Stanton from his position as Secretary of War without the approval of the Congress. Johnson had decided to fire Stanton because the Secretary was against the President's Reconstruction policies. In that way, Johnson was impeached for violating the Tenure of Office Act of 1867, which prevented the U.S. president from firing an office-holder without the approval of the Senate.