Answer:
He was charged with misconduct in office.
Explanation:
President Johnson was the first president of the United States to be impeached. He was impeached because he fired an official who was protected by the Tenure of Office Act. The Tenure of Office Act said that the president was not able to remove civil officers without the consent of the senate.
In order to impeach the president, there needs to be a 2/3 majority vote. There were not enough votes to impeach president Johnson, so he was charged with misconduct in office. Johnson remained in office until the end of his term.