Just before Israel emerged as a state in May 1948, key United States officials hesitated and backtracked. Undersecretary of State Robert Lovett told Moshe Sharett of the Jewish Agency for Palestine that the US had expected a peaceful transition to dual states in Palestine. Now, war between Jews and Arabs and a broader regional conflict loomed. Apart from the Cold War repercussions, another mass slaughter of Jews would roil the US in a presidential election year.

James G. McDonald arrived in Israel soon after its birth, serving as US special representative and later as its first...