Supreme Court justices have lifetime appointments, but that hasn't stopped some from calling for the impeachment of Neil Gorsuch. In U.S. history, only one Supreme Court Justice has ever actually been impeached (but not convicted) and one resigned under the threat of impeachment.

The purpose of a lifetime appointment was to give them freedom to make decisions without interference from the executive or legislative branches of government. But the Constitution leaves open the possibility of impeachment and removal by Congress. In U.S. history, one justice was impeached, but not convicted, and one justice resigned under the threat of impeachment.

The U.S. Constitution guarantees Supreme Court justices "shall hold their Offices during good Behavior," but what exactly constitutes bad behavior?