Photo taken in Arlington, Virginia, the United States on Sept. 29, 2020 shows C-SPAN 2 live stream of U.S. President Donald Trump (L) and his Democratic challenger Joe Biden speaking during their first debate in the 2020 presidential race.Photo:Xinhua

The US Commission on Presidential Debates announced Monday that they will mute the microphones of President Donald Trump and his Democratic rival Joe Biden when they are not answering questions during their final showdown, to avoid the interruptions that disrupted their last debate.

Each candidate will be allotted two minutes to answer the moderator's questions, during which time the other man's mic will be shut off.

Once they both have had their two minutes, there will be open discussion, and neither mic will be muted.

"It is the hope of the Commission that the candidates will be respectful of each other's time, which will advance civil discourse for the benefit of the viewing public," the Commission said.

Trump's campaign manager Bill Stepien reacted angrily to the announcement.

"President Trump is committed to debating Joe Biden regardless of last minute rule changes from the biased commission in their latest attempt to provide advantage to their favored candidate," he said in a statement.

Stepien said Trump was planning to raise a number of allegations regarding Biden's son Hunter - all of which are unsubstantiated. 

In the last debate, in September, Trump interrupted Biden 71 times, compared to the former vice president's interrupting Trump 22 times, the news site Axios reported.

The two candidates were supposed to have held a second debate on October 15, but the commission changed the rules to allow an online debate format after the president tested positive for the coronavirus. Trump then pulled out of the debate, and the two men held rival town meetings on different television channels.

Thursday's debate will be the last time the two rivals face off before the November 3 election.

AFP