In the United States, federal judges are nominated by the president and then confirmed by the Senate under the Constitution's "Advice and Consent" process. The basic idea is simple: the White House chooses a nominee, the Senate reviews that person, and a majority vote is needed for confirmation.
A vacancy opens when a judge retires, resigns, dies, or when Congress creates a new judgeship. The president then nominates a candidate, often after consulting senators and other advisers. After that, the Senate Judiciary Committee examines the nominee, holds hearings, and may ask for written follow-up answers.
For lower federal courts, home-state senators may also send in "blue slips," which are a traditional way of signaling support or opposition. The committee then decides whether to report the nominee favorably, unfavorably, or without recommendation to the full Senate. If the nomination reaches the Senate floor, debate usually ends with a vote, and confirmation requires a simple majority.
This process is one of the most important checks and balances in U.S. government because it gives both the president and the Senate a role in shaping the federal judiciary. Since federal judges usually serve for life, confirmation fights can be highly political and closely watched. In recent years, confirmations have often split along party lines, especially for Supreme Court and circuit court nominees.
Supreme Court nominees follow the same broad pattern, but the stakes and scrutiny are higher. Senate rules on debate have also changed over time, and today a simple majority is enough to confirm both Supreme Court and lower federal judges. That means the majority party in the Senate can usually move nominees through if it is unified.