Key quotes from the second debate
On the 'Trump tape' recordings - Donald Trump: "I don't think you understood what was said. This was locker room talk. I'm not proud of it - I've apologised to my family, I've apologised to the American people."
Hillary Clinton: "What we all saw and heard on Friday was Donald Trump talking about women. What he thinks about women, what he does to women, and he has said that the video doesn't represent who is he is. But I think it's clear to anyone who heard it, is that it represents exactly who he is."
On Bill Clinton's affair
Donald Trump: "If you look at Bill Clinton - far worse. Mine were words, his was action... there's never been anyone in the history of politics in this nation that's been so abusive to women."
Hillary Clinton: "When I hear something like that, I am reminded of what my friend Michelle Obama advised us all. When they go low, you go high."
On Clinton's emails on a private server
Donald Trump: "If I win, I'm going to instruct my attorney general to get a special prosecutor to look into your situation."
Hillary Clinton: "It's just awfully good that someone with the temperament of Donald Trump is not in charge of the law in this country."
Donald Trump: "Because you'd be in jail."
Donald Trump: "I don't agree [with running mate Mike Pence] ... I don't like Assad at all, but Assad is killing Isis. Russia is killing Isis."
Hillary Clinton: "I hope by the time I am president we will have pushed Isis out of Iraq. I think there is a good chance that we can take Mosul and, you know, Donald says he knows more about Isis than the generals. No, he does not. There are many very important planning going on and some of it is to signal to the Sunni Muslims in the area as well as Kurdish fighters that we all need to be in this and that takes a lot of planning and preparation."
When asked what they respected about each other
Hillary Clinton: "I respect his children. His children are incredibly able and I think that says a lot about Donald."
Donald Trump: "I will say this about Hillary: she doesn't give up, she doesn't quit."