Facing allegations of sexual harassment, Republican presidential candidate Herman Cain told reporters he will not withdraw from the 2012 race for president.<br/> (SOUNDBITE) (English) REPUBLICAN PRESIDENTIAL CANDIDATE, HERMAN CAIN, SAYING:<br/> "Ain't going to happen."<br/> Cain called the news conference to respond to Sharon Bialek, who went public on Monday, saying he made a sexual advance on her in 1997 when he was head of the National Restaurant Association.<br/> She is the fourth woman to accuse Cain of sexual harassment.<br/> Cain denies ever seeing Bialek until she appeared on television to lay out allegations he insists "simply did not happen."<br/> The 65-year-old former pizza executive - Cain - who had been leading the field of Republican candidates in many polls - is now trying to keep his campaign from unraveling.<br/> Katharine Jackson, Reuters.
