Receive Breaking News updates as they occur
By Doina Chiacu WASHINGTON (Reuters) - Republican presidential candidate Donald Trump deepened his attacks on a former beauty queen Alicia Machado on Friday, calling her "disgusting" and alleging the existence of a sex tape as he refused to back away from an issue that threatens to damage his already weak standing among women and Hispanics. Trump was quickly and sharply rebuked by his Democratic rival, Hillary Clinton, and by Machado, a Venezuelan-born former Miss Universe who was criticized by Trump for gaining weight after she won the crown in 1996. Clinton called the Republican candidate "unhinged." Clinton had raised Trump's treatment of Machado during the two candidates' first debate on Monday night as an example of how he views women.