What does it mean when US presidents are impeached?
Impeachment is when public officials are put on trial for offences. In the case of US presidents, they can be impeached for treason, bribery or other "high crimes and misdemeanours". This means the US House of Representatives makes a case against a president, and then the US Senate decides if they are guilty. If found guilty they would then remove the president from office. Only two presidents, Andrew Jackson and Bill Clinton, have been impeached but both were acquitted by the Senate. Richard Nixon resigned the presidency before he could be impeached.