John Jay, American politician and diplomat, 1st Chief Justice of the United States (born 1745)

John Jay was an American statesman, diplomat, signatory of the Treaty of Paris, and a Founding Father of the United States. He served from 1789 to 1795 as the first chief justice of the United States and from 1795 to 1801 as the second governor of New York. Jay directed U.S. foreign policy for much of the 1780s and was an important leader of the Federalist Party after the ratification of the United States Constitution in 1788.

The chief justice of the United States is the chief judge of the Supreme Court of the United States and is the highest-ranking officer of the U.S. federal judiciary. Article II, Section 2, Clause 2 of the U.S. Constitution grants plenary power to the president of the United States to nominate, and, with the advice and consent of the United States Senate, appoint "Judges of the Supreme Court", who serve until they die, resign, retire, or are impeached and convicted. The existence of a chief justice is only explicit in Article I, Section 3, Clause 6 which states that the chief justice shall preside over the impeachment trial of the president; this has occurred three times, for Andrew Johnson, Bill Clinton, and for Donald Trump's first impeachment.