Richard Nixon (1913-1994) was the 37th President of the United States, serving from 1969 to 1974, and was one of the most controversial presidents of the twentieth century. He achieved major foreign-policy breakthroughs by opening relations with Communist China, pursuing Détente with the Soviet Union, and the withdrawal from Vietnam. His presidency was ultimately brought down by the Watergate scandal, making him the only U.S. president to resign from office.

Gerald Ford (1913-2006) was the 38th president of the United States, assuming office in 1974 after Richard Nixon resigned. A longtime congressman and former vice president, Ford sought to restore trust in the federal government while confronting inflation, unemployment, the Watergate scandal, and the aftermath of the Vietnam War. Ford is remembered for providing stability and helping the nation recover.

John F. Kennedy (1917–1963) was the 35th president of the United States, serving from 1961 until his assassination in 1963. His presidency was defined by Cold War confrontations, including the Cuban Missile Crisis, the expansion of the space program, and increasing federal support for civil rights. Though his presidency lasted less than three years, Kennedy's assassination and his vision of American public service made him one of the most enduringly remembered presidents in American history.

George H. W. Bush (1924-2018) was the 41st President of the United States, whose long career in government included service as a congressman, diplomat, CIA director, and vice president. His presidency was defined by the end of the Cold War, the collapse of the Soviet Union, the Persian Gulf War, and major domestic legislation. Bush left a legacy as an experienced and pragmatic statesman whose emphasized diplomacy and international cooperation.

Jimmy Carter (1924-2024) was the 39th president of the United States, serving from 1977 to 1981 during economic challenges, energy shortages, and international crises. His presidency achieved significant diplomatic successes, while his administration also promoted human rights, energy conservation, and environmental protection. After leaving office, Carter became a leading humanitarian through the Carter Center, earning the 2002 Nobel Peace Prize.

Joe Biden (1942-) is an American politician who served as the 46th president of the United States from 2021 to 2025, following 36 years as a U.S. senator from Delaware and eight years as vice president under Barack Obama. His presidency focused on rebuilding the economy after the COVID-19 pandemic, investing in infrastructure and domestic manufacturing, expanding clean-energy programs, strengthening U.S. alliances, while facing controversies over inflation, immigration, Afghanistan, and his age.