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By Doina Chiacu WASHINGTON (Reuters) - Republican presidential candidate Donald Trump increased his attacks on a former beauty queen with a vague and unsubstantiated allegation about a sex tape in predawn Twitter posts on Friday that prompted Democratic rival Hillary Clinton to denounce him as "unhinged." Trump's refusal to drop his invective against Alicia Machado, the Miss Universe from Venezuela whom he criticized for gaining weight after she won the crown in 1996, threatened to damage his already weak standing among women and Hispanics. With less than six weeks to go until the Nov. 8 election, Trump made reference - without giving evidence - to a sex tape involving Machado, who had publicly denounced him all week as a humiliating bully.
HOBOKEN, N.J. (AP) — National Transportation Safety Board investigators held off questioning the engineer in the deadly Hoboken train crash because of his injuries Friday and struggled to lift clues from the train's black box recorders.