An exercise in alternate history.
The path to the creation of the United Socialist States of America began with the death of President Franklin Roosevelt on April 12, 1944 and the accession to the Presidency by Vice-President Henry Wallace. Personally favorable to the Soviet Union, the new President surrounded himself with fellow travelers and security risks.
In the Presidential election of 1944 Thomas E. Dewey, the Republican nominee, denounced Wallace as “soft on Communism”, a charge that Wallace vigorously denied. Wallace was elected in a close contest with Senator Glen Taylor (D.Id) as his Vice-President.
Following the conclusion of World War II, Wallace followed a policy of rapid demobilization which was quite popular, leaving only three divisions in Europe for occupation duties. General Eisenhower denounced this as being an inadequate force and resigned from the Army. Wallace turned a blind eye to the Soviet imposition of Communist governments in Eastern Europe, with his inaction being denounced vociferously by the Republicans and by many Democrats, most notably Senator Harry Truman (D.Mo.).
Which member of the Wallace administration secretly provided the Soviets with the blue prints to build atomic bombs in 1945 remains unclear, but suspicion has usually focused on Secretary of State Alger Hiss. Hiss was certainly instrumental in turning Werner von Braun and his associates over to the Soviets in 1945. By 1948 Communist parties dominated all of Eastern Europe and Italy.
Wallace was defeated for re-election in 1948, running on the Progressive Party ticket after being denied the Democrat nomination which went to Harry Truman. Thomas E. Dewey, the Republican standard bearer, won in the fall with Truman a close second and Wallace a humiliating third with 2.4% of the votes.
The Wallace administration was history, but it left behind in the government bureaucracies many individuals who served as agents for the Soviet Union out of ideological conviction. Steps to remove them were only partially successful, and throughout the ensuing Cold War they provided steady intelligence to the Soviet Union which allowed it to maintain a technological parity with the United States as the years passed. Rising to senior positions in the various government bureaucracies they sheltered younger agents who joined them over the years.
With the defeat of US forces in Vietnam, the Henry Wallace wing of the Democrat party became dominant, with George McGovern narrowly defeating Ronald Reagan in 1976. Embarking on a policy of a 37% reduction in military spending, which represented in practice a policy of unilateral disarmament, McGovern was not a knowing agent of the Soviet Union, although it is difficult to see what difference it would have made in his policies if he had been. He steadfastly ignored the toppling of governments of Central America by communist insurrections and the swarms of Soviet advisors that helped prop up the new regimes. The beginning of a Communist insurrection in Mexico in 1978 alarmed many in the United States, but McGovern stuck to his policy of “Come Home America” and continued his policy of non-involvement in military struggles abroad.
The Soviets struck against the United States with limited nuclear strikes, an invasion across the Bering Straits into Alaska of 60 divisions, and 30 divisions driving north from Central America on May 2, 1979. Chaos reigned at American bases, most of which had been thoroughly infilitrated. Although many Americans wished to fight to the death, President Edward M.Kennedy, who took office after the death of President McGovern in a bombing raid on Washington, surrendered on May 1, 1980, which is regarded as the date of the creation of the United Socialist States of America.