Term: 1963–1969
Lyndon B. Johnson launched the "Great Society," creating programs like Medicare and Medicaid. These social programs, part of the "War on Poverty," required enormous federal spending and fundamentally expanded the government's role in American life, representing the "butter" portion of his economic policy.
Johnson also dramatically escalated involvement in the Vietnam War, with troop numbers swelling to over 500,000 by 1968. This massive military commitment was incredibly costly. Johnson resisted raising taxes significantly to pay for both the Great Society and the war, leading to large annual deficits and rising inflation.
Debt at Start of Term (1963): ~$306.0 billion
Debt at End of Term (1969): ~$353.7 billion
Total Increase: ~$47.7 billion
Percentage Increase: ~15.6%