republican presidential nomination, could not have been more clear about it today. he said "i have never sexually harassed anyone." ut he acknowledged that he was accused of sexual harassment in the 1990s and that the accusers received a monetary settlement. hichstory, which broke late last night, has shaken up the g.o.p. night, has campaign. political correspondent jan crawford has the late-breaking developments. >> reporter: he's a front-runner under fire. >> sir, excuse me! >> reporter: today herman cain theon the defensive, flatly denying accusations of sexual harassment. >> whil...