Donald Trump says if he was in charge of American laws, Hillary Clinton would be in jail over her use of a private email account while she was US Secretary of State.
Mrs Clinton says she takes responsibility for using a personal email account and it was a mistake.
The Democratic and Republican candidates went head-to-head in a live TV debate last night, in what's being described as one of the most bitter to date.
Hillary Clinton said Trump's comments about women show that he's unfit to be president.
But the Republican has accused Hillary Clinton of lying again, over the scandal surrounding the deletion of 33-thousand of her e-mails.
