Let's take as our POD that Wallace is not replaced by Truman. Nothing changes...until FDR dies. Now, Henry is POTUS. What now? We most likely don't drop the bomb on Japan, The Cold War is probably delayed by a few years, Korea may suffer some Butterflies. In terms of domestic policy, there's probably not much of an impact, at least, if Wallace has to deal with the same Republican Congress Truman did OTL though Unions may be invigorated by Henry's win. That said, Wallace most likely won't win over Dewy come 1948. That causes a whole host of other Butterflies. How does Dewey's term go? Who do the Democrats nominate in 1952? Stevenson? Humphrey, maybe? Also, Dewey winning means the Republicans never draft Eisenhower. No Eisenhower Presidency means that Nixon probably never gets the VP potion which means that he remains a Senator and has far less power or name recognition on a national level. Who takes his place? Reagan? Probably not. Romney? Maybe. Your thoughts?