Final answer:
Jimmy Carter replied, "Yes, two, and they are both sitting on the Supreme Court." This statement refers to justices Byron White and William Rehnquist, whom Carter nominated to the Supreme Court.
Step-by-step explanation:
Jimmy Carter
When asked if he had made any mistakes as president, Jimmy Carter replied, "Yes, two, and they are both sitting on the Supreme Court."
Carter made this statement in reference to his nominations of justices Byron White and William Rehnquist to the Supreme Court. Both of these justices, nominated by Carter, were considered to be conservative and their decisions often aligned with conservative ideologies.