"Nixon - turned Vietnam over to the South Vietnamese who defeated the single largest communist invasion of the war in 1972 without any assistance from US ground combat units."<quoted text>
Truman - Alger Hiss conviction, barely won the 1948 election, stalemate in Korea. It took the Democrats about 20 years to recover from the Alger Hiss conviction (that brings us to 1968)
Eisenhower - The Soviet Union are unable to start a proxy war anywhere in the world, the proxy war being the strategy they settled on to defeat the United States.
Kennedy - Bay of Pigs fiasco; started the Cuban Missile Crisis by putting nuclear missiles on the Soviet border in Turkey. The Soviets countered by putting nuclear missiles in Cuba. The stand-off ended after Kennedy caved and removed the missiles from Turkey.
Johnson - the last substitute president during the Democrats' recovery period after the Alger Hiss conviction. Quit his job so the Vietnam proxy war could be blamed on the next Republican president, coincidentally, the same person responsible for the conviction of Alger Hiss.
Nixon - turned Vietnam over to the South Vietnamese who defeated the single largest communist invasion of the war in 1972 without any assistance from US ground combat units.
Ford - reasonable substitute for a Democrat. Part of the Warren Commission. The front in the Cold War moved from half way around the world to Central America.
Carter - Stagflation and defeat everywhere in the world.
Reagan - Won the Cold War and set up everthing the dot-com boom needed to happen.
...... and on and on and on....
Ford in 1974?