Supreme Court should have eleven justices, each one with one twenty-two year non-renewable term. Each justice’s term will be staggered, allowing every President to select at least two for the court per term.
The President can only nominate a justice from a list created by a Judicial Commission of ten potential picks.
However, each President should only get to pick two justices per term (four Justices for two terms if reelected). If more than two vacancies are created during a President’s term, then the longest serving federal judge should fill the vacancy and gain the same twenty-two year term other Justices on the court have. If two or more inferior judges have the same longest serving time in the United States, then the leader of the Judicial Commission nominates and the Senate confirms to fill the vacancy similar to when the President nominates someone to the Supreme Court.
The “longest serving” inferior Judge simply means one who has served the longest on a federal Court. For example, assuming one is appointed in 1980 and does not stop being an inferior Judge, then they are still serving as an “inferior Judge.” If they move up or down the federal Court system as a Judge, such as Appellate or District court, then they still maintain their “inferior Judge” status. However, once they become a Supreme Court Justice, they end their inferior Judge status completely, with what ever inferior Judges below them now become the longest serving ones since they are still currently inferior Judges.
The President should have no say in who the federal judge who replaces a vacancy on the Supreme Court should be if they have already replaced two previous vacancies within their term.
When actually implementing this reform, the determination for how the current Supreme Court justices get their staggered terms will be by giving the longest serving Justice the shortest term all the way to giving the newest Justice the longest term.
State officials preferably should be the same, but I believe its better that states decide that for themselves.