Andrew Johnson, Bill Clinton, Donald Trump
Explanation:
Andrew Johnson: Impeached in 1868. Basically, he was Lincoln's vice president, but 42 days into Lincoln's term he was assinated and shot in the head. So Johnson became president; the problem was that he didn't really get along with Radical Republicans in Congress, calling for pardons for Confederate leaders and vetoing political rights for freedmen. Then Congress got irritated and angry with him and passed Tenure of Office Act, which barred the president from replacing members of his cabinet without Senate approval. Johnson thought it was unconstitutional and went ahead and  fired his Secretary of War, an ally of the Radical Republicans in Congress. When he did that he broke the law, which gave congress a reason to impeach him. Johnson was impeached in the House of Representatives by 126 votes to 47, but narrowly avoided a two-thirds guilty verdict in the Senate by a single vote. So he got to stay in office.
Bill Clinton: Well he was just a mess. There were a lot of diffrent things... but the main thing that was he was having an affair with Monica Lewinsky, a white house intern, and there was just a ton of evidence to prove it. But when it when public Clinton denied it on national telivison and under oath; so he committed perjury. On December 19, 1998, the House of Representatives voted to impeach Clinton on two separate counts: perjury and obstruction of justice. But in the ensuing five-week Senate trial, Clinton was acquitted on both counts.
Lastly dear old trumpHe was impeached on two counts: abuse of power and obstruction of Congress.The complaint, which was corroborated by the acting Ambassador to Ukraine, stated that Trump had threatened to withhold U.S. foreign aid money until Zelensky promised to investigate Hunter Biden, son of leading Democratic 2020 candidate Joe Biden, for suspicious dealings in Ukraine. And that's this thing called "quid pro quo," which is illegal. But Trump was aqquitted. :(
Hope this helps :)
