A man reads the Chicago Tribune announcing President Lyndon B. Johnson’s decision not to run for reelection in 1968.Corbis/Getty Images Kevin J. McMahon, Trinity College and Michael Paris, College of Staten Island, CUNY After President Joe Biden’s disastrous performance at the June 27, 2024, debate, many Democrats have raced to ring the alarm bell, proclaiming that it’s time for him to step aside, time to let someone else take the reins in hopes of defeating Donald Trump in November. With that in mind, as political scientists with a side interest in sports, we recount three moments from histor…