So here's the scenario: In June of 1944, the day before D-Day, FDR suffers a fatal heart attack or stroke, putting Henry Wallace in the Oval Office. That August, at the 1944 Democratic National Convention, there's a movement to prevent President Wallace from getting the nomination. There's a dragged-out fight on the convention floor, including figures suck as James Byrnes, Harry F Byrd, and James Farley putting their names in the ring. At its peak, a movement to nominate Harry Truman as a compromise candidate gets 494 votes on the convention floor, but ultimately, on the 19th ballot, President Wallace prevails. What follows is a long campaign in which Dewey bests Wallace, taking advantage of disaffected Democrats staying home or switching to his side, including the tacit support of some Democrats, provided that certain members of FDR's cabinet stay on in a Dewey administration.
How does Wallace handle the war for the eight months he's commander in chief? How does the campaign in the West go? How does Dewey treat with Churchill and Stalin at Yalta? How does a Dewey Administration deal with the rest of the war? How does he handle the postwar era? What about the strikes in 1946?