US presidential nominee Donald Trump and Democratic US presidential nominee Hillary Clinton take part in their third and final 2016 presidential campaign debate, moderated by Chris Wallace (C), at UNLV in Las Vegas, Nevada, US, October 19, 2016. [Photo/Agencies]

Clinton said the women came forward after Trump said in the last debate he had never made unwanted advances on women. In a 2005 video, Trump was recorded bragging about groping women against their will.

"Donald thinks belittling women makes him bigger. He goes after their dignity, their self-worth and I don't think there is a woman anywhere who doesn't know what that feels like," Clinton said. She cited other minorities she said Trump had maligned.

"This is a pattern. A pattern of divisiveness, of a very dark and in many ways dangerous vision of our country where he incites violence, where he applauds people who are pushing and pulling and punching at his rallies. That is not who America is," she said.

Trump seeks to reverse his fading momentum in an election that opinion polls show is tilting away from him. The New York businessman has raised concerns by claiming the election will be rigged against him. He has urged supporters to patrol polling places in inner cities to prevent voter fraud.

The two presidential rivals had tough but issues-based exchanges on abortion, gun rights and immigration during the 90-minute showdown.