The Constitution
impeachment
The House's formal accusation against a President, judge, or other civil officer, by majority vote. Removal requires a separate Senate trial and a two-thirds conviction.
In full
Impeachment is indictment, not conviction: the House impeaches by simple majority, and the Senate then tries the case, with a two-thirds vote of members present required to convict and remove. The Chief Justice presides when a President is tried. Punishment is limited to removal and, by separate vote, disqualification from future office; ordinary criminal liability is untouched.
Also written as: high crimes and misdemeanors, articles of impeachment
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A plain-language explanation for civic education, not legal advice. When in doubt, the official source named above controls.