US Democratic presidential nominee Hillary Clinton has once again said that her Republican rival Donald Trump is “threatening” America’s democracy. Speaking at a rally in Philadelphia, Pennsylvania, Saturday night, Clinton said that Trump’s suggestion that he would not concede if he lost the election is “a direct threat to our democracy.”

She said the US has always had a “peaceful transfer of power” and “that is the difference between the rule of law and the rule of strong men.” Clinton also said she was sick and tired of her rival’s campaign “denigrating America.” “Come on, give me a break,” she said. “This country has created more economic opportunity for anyone in the history of the world. We just have to get it spun up again.”

On Thursday, Trump said that he would have the right to challenge the outcome of the upcoming election if he felt it is “questionable,” adding that he might “contest or file a legal challenge.” In response, Clinton said Friday that “by doing that, he is threatening our democracy,” noting, “We know in our country the difference between leadership and dictatorship.”

Trump had been lagging behind the former secretary of state among likely voters for weeks.  However, Trump for the first time since the second debate topped Clinton in a poll this week. The candidate’s favorability has plunged over a 2005 video tape that showed him using obscene language against women.

In addition, a total of eleven women have come forward accusing the business mogul of sexually abusing them. Trump, however, has rejected all the accusations, and even said Saturday he would sue every one of his accusers after the election.

Presstv