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A2: The House debates the charges. Despite the Constitution saying "high crimes and misdemeanours", no criminal indictment or conviction is necessary. In the language of the time, this was already understood as a general reference to corruption or misconduct in office.
In practice, literally ANYTHING is impeachable, if a majority of the House agrees that it is.
At the end of debate, the House votes. A simple majority validates the indictment.
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