Impeachment is the process by which a legislative body brings charges against a public official for alleged misconduct. At the federal level in the United States, the House of Representatives has the sole power to impeach, meaning to approve articles of impeachment, while the Senate has the sole power to try the impeachment and remove the official from office. This explainer outlines what is constitutionally and procedurally needed for impeachment, how the process differs from conviction and removal, and how state impeachment proceedings compare. It is intended as a durable reference for understanding the requirements, standards, and practical steps involved.
Constitutional Thresholds and Core Requirements
The U.S. Constitution specifies who may impeach, who may try, and the grounds for impeachment. It does not define a single threshold like "criminal guilt," but sets political and legal standards that have shaped practice. The core requirements include:
- Grounds: treason, bribery, or other high crimes and misdemeanors.
- Initiating body: the House of Representatives impeaches by majority vote on articles of impeachment.
- Trying body: the Senate conducts a trial after receiving articles of impeachment from the House.
- Removal standard in the Senate: two-thirds majority of senators present and voting to convict and remove from office.
No president has ever been removed following impeachment by the House and conviction by the Senate. Several have been impeached by the House and tried by the Senate, with one official resigning after the House adopted articles but before Senate trial began. The distinction between impeachment (a formal accusation) and removal (the actual removal from office) is essential to understanding what is "needed" at each stage.
Federal Impeachment Process: Step by Step
Impeachment at the federal level unfolds in stages, each with distinct actors and requirements. The process is political as well as legal, and outcomes depend on facts, evidence, rules, and political dynamics.
Initiation and Investigation in the House
Impeachment inquiries can be launched by House leadership or referred to committees, most often the House Judiciary Committee. Committees may conduct investigations, hold hearings, and request documents and testimony. For a resolution to move forward, a simple majority of the full House voting on the article(s) is required to impeach. This majority vote is the first constitutionally needed step to trigger a Senate trial.
Trial and Conviction in the Senate
After the House impeaches, the Senate organizes a trial with its own rules. The chief justice presides when the president is tried; otherwise, the vice president or a senator presides. House members act as managers, presenting the case, while senators serve as jurors. Conviction and removal require two-thirds of senators present and voting. If the vote falls short, the official remains in office. The Senate may also vote by a simple majority to disqualify the official from future federal office, a separate penalty that does not require a two-thirds threshold.
Historical Outcomes and Key Benchmarks
Since the Constitution's adoption, only a handful of federal officials have been impeached by the House, and even fewer have been convicted and removed by the Senate. The table below summarizes notable cases to illustrate what thresholds were met and what outcomes followed.
| Official | Impeached by House | Tried by Senate | Convicted/Removed by Senate | Disqualification from future office |
|---|---|---|---|---|
| William Blount (senator, 1797) | July 1798 | Yes | Not convicted (dismissed for lack of jurisdiction) | No |
| Andrew Johnson (president, 1868) | Feb 1868 | May−May 1868 | Acquitted by 1 vote | No |
| Bill Clinton (president, 1998) | Dec 1998 | Jan−Feb 1999 | Acquitted on both articles | No |
| Donald Trump (president, 2019‑2021) | Dec 2019; Jan 2021 | Jan 2020; Feb 2021 | Acquitted twice | No (first trial); No (second trial) |
| Richard Nixon (president, 1974) | Resigned before House voted on articles | None (no impeachment) | N/A | N/A |
| Bladen County Court officials (North Carolina, 1803) | State-level case; details vary | State-level trial | Removed and disqualified | Yes |
State and Local Impeachment
Many states have impeachment mechanisms for governors, judges, and other officials. Requirements and procedures vary, but most mirror the federal model: a lower chamber (or equivalent body) impeaches by majority vote, and a higher chamber or commission tries the case and can remove with a supermajority or other specified threshold. Some states use alternative removal mechanisms, such as recall elections or judicial discipline bodies, depending on the office and offense. What is needed at the state level depends on the state constitution, statutes, and rules of procedure, so it is important to check the specific state and local provisions.
Impeachment vs. Other Accountability Tools
Impeachment is often discussed alongside other measures, and confusion arises about what each mechanism does and what it requires:
- Recall elections: allow voters to remove officials before their term ends via petition and ballot, distinct from legislative impeachment.
- Censure and condemnations: formal expressions of disapproval that do not remove officials from office.
- Criminal prosecution: separate from impeachment; an official can be prosecuted after, before, or without impeachment, though sitting officials may face practical or procedural constraints.
- Ethics and lobbying penalties: handled by ethics commissions or oversight bodies, not through impeachment.
Impeachment specifically concerns legislative removal for official misconduct and requires political majorities in designated chambers, not a criminal standard beyond a reasonable doubt. This is a critical distinction for understanding what is legally and politically needed.
What Must Be Demonstrated for Impeachment and Removal
Because impeachment is a political process rooted in the Constitution and legislative rules, the needed evidence and demonstration differ from a criminal trial. Key points include:
- Grounds: the House may adopt articles alleging treason, bribery, or other high crimes and misdemeanors; the phrase "high crimes and misdemeanors" has been interpreted broadly to include abuses of public trust, not only criminal statutes.
- Evidence and procedure: committees may gather documents, compel testimony, and hold hearings. The House may set its own evidentiary and procedural rules.
- Political threshold for impeachment: a simple majority of the House voting on the article(s).
- Removal threshold in the Senate: two-thirds of senators present and voting to convict; procedures for calling witnesses and admitting evidence are determined by the Senate.
- Disqualification: the Senate may, by a simple majority, vote to disqualify an official from future office, separate from removal.
Because the process is political, factual findings and legal conclusions interact with institutional norms, precedents, and strategy. What is needed, therefore, includes not only constitutional and statutory thresholds but also sufficient political support in the House to impeach and in the Senate to convict and remove.
Common Misconceptions and Clarifications
Several misunderstandings about impeachment can obscure what is actually needed:
- Impeachment is not a criminal indictment or conviction; it is a formal accusation by the House.
- Removal from office requires a Senate conviction, not just a House impeachment.
- A president or official can remain in office even after impeachment if the Senate does not vote to convict.
- Impeachment applies to "high crimes and misdemeanors," a category that is not strictly limited to prosecutable crimes.
- The chief justice presides only over presidential impeachments; other trials are presided over by the vice president or a senator.
Key Takeaways
To summarize what is needed for impeachment and removal:
- Impeachment (House): a simple majority vote on articles of impeachment, grounded in treason, bribery, or other high crimes and misdemeanors.
- Removal (Senate): a two-thirds vote of senators present and voting to convict and remove from office.
- Separate vote: the Senate may, by a simple majority, disqualify the official from future office.
- Process note: impeachment is a political, constitutional process that does not require a criminal standard of proof.
State and local impeachment requirements vary and depend on applicable constitutions, statutes, and rules. Understanding the distinct roles of accusation, trial, and removal is essential for correctly interpreting discussions about what is needed for impeachment in any jurisdiction.