CLIVE, IOWA: Nikki Haley has long tried to set herself apart from her Republican presidential rivals on foreign policy, peppering her speeches with anecdotes about serving as United Nations ambassador and the threats she sees from China and Russia.The war provoked by Hamas' attack on Israel has shaken American politics — and put the primary race in her wheelhouse.Haley still remains well behind former President Donald Trump after two energetic debate performances but is trying to position herself as his chief rival by drawing contrasts on how they...