'Late breakers' or undecided voters could decide the next president of the United States.
Donald Trump and Joe Biden are vying for the position in today's final debate.
This time, the moderator will be able to mute either candidate, to stop interruptions when the other is speaking.
US correspondent Nick Bryant told Mike Hosking polling shows Biden leading by a few points, but Trump's campaign is counting on last minute voters.
He says in the last election, many people decided to vote for Trump in the final few days.
“There’s a very small number of people now who are undecided.”
Bryant said a major factor in the last election were the ‘late breakers,’ people who decided to give Donald Trump their votes on the last few days.