Impeachment is a process by which a legislative body or other legally constituted tribunal initiates charges against a public official for misconduct. Impeachment tends to be confined to ministerial officials as the unique nature of their positions may place ministers beyond the reach of the law to prosecute, or their misconduct is not codified into law as an offense except through the unique expectations of their high office. Both "peers and commoners" have been subject to the process, however.
From 1990 to 2020, there have been at least 272 impeachment charges against 132 different heads of state in 63 countries. In Latin America, which includes almost 40% of the world's presidential systems, ten presidents from seven countries were removed from office by their national legislatures via impeachments or declarations of incapacity between 1978 and 2019.
Most democracies (with the notable exception of the United States) involve the courts (often a national constitutional court) in some way. National legislations differ regarding both the consequences and definition of impeachment, but the intent is nearly always to expeditiously vacate the office. Most commonly, an official is considered impeached after the commencement of the charges, and a trial of some kind is required to remove the official from office.
Impeachment is distinct from the motion of no confidence procedure available in some countries whereby a motion of censure can be used to remove a government and its ministers from office. Such a procedure is not applicable in countries with presidential forms of government like the United States. Because impeachment involves a departure from the normal constitutional procedures by which individuals achieve high office (election, ratification, or appointment) and because it generally requires a supermajority, it is usually reserved for those deemed to have committed serious abuses of their office. In the United States, for example, impeachment at the federal level is limited to those who may have committed "Treason, Bribery, or other high crimes and misdemeanors". Under the United States Constitution, the House of Representatives has the sole power of impeachments while the Senate has the sole power to try impeachments (i.e., to acquit or convict); the validity of an impeachment trial is a political question that is nonjusticiable (i.e., is not reviewable by the courts).
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