Trump and Clinton launch more attacks in Wednesday campaigning

Hillary Clinton and Donald Trump cranked up the pressure on Wednesday during an intense day of campaigning in key battleground states, with only five days remaining until the candidates learn their fate.

Both the Democrat and Republican candidates threw further insults towards their opponent on the campaign trail, with Trump predicting a victory for himself and insulting Clinton in Florida.

He said that the narrowing of polls were an indication that he has gained the momentum necessary to win.

"It's feeling like it already, isn't it?" Trump told supporters at the rally in Penascola. He added that the former secretary of state was completely unqualified to lead the United States, referring to her as "totally unhinged".

Clinton hit back during a rally in Las Vegas, Nevada, accusing the New York businessman of creating a divisive campaign and turning American citizens against each other.

She said he was "out of his depth" and that he "doesn't have a clue" how to run the country.

Financial markets have been jittery on the news that Trump is closing in on Clinton in several national polls, disrupting the previously-held view that the Democrat would win and maintain the status quo.

Stock markets, oil markets and the dollar all fell on Wednesday, as investors are increasingly considering the previously unthinkable - that Donald Trump will be elected president of the United States.