Some of these require quite early POD's. I don't think anything requiring a POD before Truman's *1948* election should count, and both the Soviet a-bomb and the Communist victory in China were inevitable well before that point IMO.
If the Korean War could be avoided (and in OTL Stalin only gave Kim Il Sung a green light reluctantly after first turning him down several times) it is possible that Eisenhower will decide not to run in 1952 (the world situation is less tense, and Ike is less convinced that the country urgently needs him). This would make Taft the most likely GOP candidate. Fearing that a Taft presidency would be disastrous for the country, Truman might decide to run again, and without the burden of Korea could conceivably defeat Taft. True, there would still be the issues of corruption and communism in government and of the "loss" of China, but against that, one must consider that Taft does not have Ike's great personal popularity, and that there are widespread fears that he will scrap the entire New Deal and take the country back to isolationism (though Taft's real views on both domestic and foreign issues were considerably more complex).