One of my favorite POD's is Dewey actually defeating Truman in 1948, and I've often wondered how this would have impacted Korea. In OTL, Stalin at first didn't like the idea of North Korea invading the South, suspecting the US would intervene and win. However, from 1949-50 the US made it increasingly clear that it had little if any commitment to defending South Korea (the US withdrew troops, cut off aid, and Acheson declared it outside America's "strategic defense perimeter"). Soon, the Communists became convinced if they invaded South Korea the US wouldn't intervene. Stalin gave the greenlight, and the Korean War begun. Now, if a new Republican President enters office with the bellicose anti-Communist John Foster Dulles as SecState, would the same events have occurred? Dulles was an outspoken hardliner, believing in brinkmanship and rollback of Communism all around the world; presumably this would have included South Korea. Dewey wanted to pump billions into defense once inaugurated, and if his coattails included a more conservative, Republican Congress it might be less likely that South Korean aid is abandoned. Would the war have happened under Dewey? If you answered yes or no, how do you think his presidency would play out beyond there?