Final answer:
When judges don't finish their term, the President selects a qualified appointee who is then voted on by the Senate.
Step-by-step explanation:
Judges play a crucial role in the U.S. judicial system. At the federal level, the president nominates candidates for judgeships or justice positions, and the nominee must be confirmed by a majority vote in the U.S. Senate. All judges and justices in the national courts serve lifetime terms of office. When a judge doesn't finish their term due to death, retirement, resignation, or impeachment, the President selects a qualified appointee who is then voted on by the Senate.