system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How does the impeachment process work?
gpt
Someone (usually a member of the House of Representatives) files impeachment charges, those charges move to a committee for review. If the committee decides to move forward with it, a vote is held in the House. 

Impeachment is similar to an arraignment, where a judge decides if the charges against someone have merit. If the President is impeached by the House (a majority voting in favor of impeaching), it moves to the Senate for something that's akin to the actual trail in a court. If 2/3 of Senators vote in favor, only then will the President be removed from office.

So in the 90s, Bill Clinton was impeached by the House, but not removed from office by the Senate. Andrew Johnson was also impeached, but no President has ever been removed from office this way. Richard Nixon probably would have, but he resigned before impeachment proceedings could take place.