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Apparently there was a fair bit of hostility toward Truman's recognition of Israel within the US government at the time. http://en.wikipedia.org/wiki/Israel–United_States_relations#Recognition_of_the_state_of_Israel
What if Truman bowed to the anti-recognition opinions in the government and opted out of recognition in 1948? How long would it take for recognition to happen and would it have any effect on the nascent state?