Democratic presidential candidate Hillary Clinton said she will be keen on the issues hurled against her Republican rival Donald Trump instead of thinking of what he might say to her.

Clinton told reporters of their aboard on her campaign plane she "debated him for four and a half hours. I don't even think about responding to him anymore."

Just weeks away from the election, the focus on the campaigns has been on controversies Trump is currently facing, according to BBC News.

Last October 22, Trump pledged to file suit against every woman who accused him of inappropriate behavior and sexual assault.

Many analysts predicted her campaign to be "the biggest election in American history."

"More people are going to turn out than ever before," Clinton's campaign manager Robbie Mook said in a television interview.

According to Reuters report, Clinton called Trump a "sole loser" for his declining to accept the results of the coming November 8 elections in a rally at the University of North Carolina at Charlotte last October 23.

"To say you won't respect the results of the election, that is a direct threat to our democracy," Clinton said. "The peaceful transfer of power is one of the things that makes America America."

Kellyanne Conway, one of Trump's top advisers, admitted earlier that day that the Republican candidate was lagging behind Clinton only weeks to go before the elections. Conway also said the former state secretary had "tremendous advantages," which includes a huge campaign bourse that had enabled her to spend millions on ads.

But Conway said the Trump campaign was aiming to persuade undecided voters.

Trump said many times that the presidential election is being "rigged" as the gap of initial polls has widened. He has yet to give evidence to back his claims.

Studies have shown the election system in the United States remains to be sound.