Trump's habit of fuming over slights comes at political cost

Republican presidential candidate Donald Trump speaks at a rally, Friday, Sept. 30, 2016, in Novi, Mich. (AP Photo/John Locher)NEW YORK (AP) — Donald Trump’s five-day feud with a former beauty queen is only the latest example of his insistence on airing and re-airing his grievances no matter the political cost.

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