A. Resigning from office
B. Declaring a state of emergency
C. Choosing not to run for reelection
D. Vetoing a major bill
Submitted by: Areesha Khan
Joe Biden became the first sitting president to stand down from a possible reelection since Lyndon B. Johnson in 1968.
The correct answer to the question: "What significant political decision did Joe Biden make that had not been made by a sitting U.S. President since 1968?" is "Choosing not to run for reelection".