With a POD in 1952 it would be almost impossible to have Truman win barring a miracle, so I'm going to set the POD at no earlier than Truman's re-election in 1948. He has to win re-election in 1952, with Ike running as a Democrat to succeed him in 1956 (Ike doesn't have to win, though I imagine he's too popular not to).
How can this be brought about, and what would the effects be? I imagine the Korean war has to be butterflied or go a lot better for Truman to have decent approval ratings. Though assuming he runs against Taft in 1952, could Ike endorse him? Assuming then Eisenhower doesn't have a heart attack in 1955 due to not having the stress of the presidency, could he seek the Democratic nomination in 1956?
How can this be brought about, and what would the effects be? I imagine the Korean war has to be butterflied or go a lot better for Truman to have decent approval ratings. Though assuming he runs against Taft in 1952, could Ike endorse him? Assuming then Eisenhower doesn't have a heart attack in 1955 due to not having the stress of the presidency, could he seek the Democratic nomination in 1956?