(SOUNDBITE) HERMAN CAIN, REPUBLICAN PRESIDENTIAL CANDIDATE, SAYING (English):<br/> "It ain't over till it's over."<br/> US Republican Presidential candidate, Herman Cain presses ahead with his struggling campaign despite allegations of an extramarital affair.<br/> The former pizza company executive led the Republican race just over a month ago.<br/> He's nose-dived in polls after a series of sexual harassment charges and campaign missteps.<br/> Marie-Claire Fennessy, Reuters
