As the US election approaches, the televised debate between former US President Trump and current Vice President Harris will be held on September 10. However, this Sunday, Eastern Time, the originally scheduled debate plan suddenly changed, and Trump suddenly threatened to withdraw from the debate - this caused another wave of turmoil in the US election.

On September 10 this year, Harris and Biden will participate in a debate hosted by ABC - this debate had previously been finalized by Biden and Trump, but after Harris replaced Biden as the Democratic candidate, she put forward some new requirements for the debate rules.

Harris' team proposed that they wanted to have open microphones throughout the debate, but Trump's team disagreed. Trump's team had previously finalized the debate rules with Biden's team, which was to turn off the microphone of the other party when one party was speaking - just like the Trump-Biden debate in June, so they disagreed with this change.

Trump also specifically hinted that he believed the previously agreed debate venue, ABC, was partisan and might be disadvantageous to him. On Sunday, Eastern Time, Trump posted on social media, suggesting that he might not be willing to participate in the debate:

"Why would I debate Kamala Harris on that TV station? ... They are under a lot of questioning and must answer everything!!"

In addition to the election rules, the Trump team is also apparently dissatisfied with the election venue. Trump had previously proposed that Fox News host another debate on September 4, but the Harris team disagreed. Fox News has always been a mouthpiece media for the Republican Party.

Trump also complained on social media: "Why does Harris refuse to debate on Fox News, NBC, CBS or even CNN? Wait for my announcement!!!"

Television debates have a huge impact on the US election because they will greatly affect the image of the two candidates in the public's mind. In the first presidential debate on June 27 this year, the then Democratic candidate Biden performed poorly in the debate, which led to a sharp drop in his poll support and pressure from many donors to withdraw their investment, which also became one of the important triggers forcing Biden to eventually give up the election.

Harris spokesman Brian Fallon said on Monday Eastern Time that the vice president's campaign team hopes that broadcasters will keep the candidates' microphones on throughout the debate, rather than muting them when their opponents speak, as was done in the last presidential debate.

"The Vice President is ready to respond to Trump's constant lies and disruptions in real time. Trump should stop hiding behind the mute button," Fallon said in a statement.

Jason Miller, a senior adviser to the Trump campaign, responded that they had agreed to the same terms for this debate as the CNN debate in June (in which one party's microphone was muted while the other party was speaking), adding: "We said we would not change the rules that have been agreed upon."

But Trump later told reporters that he actually prefers to have the microphone on, adding that he did not like the rule of muting the microphone as in the last debate. "It doesn't matter to me. I would rather it be on. But the protocol now is the same as last time," Trump said. He also revealed that he seemed to have a plan for this debate and did not do much different preparation because of the different debaters. "I won't spend too much time on it (debate). I think I've been preparing for debates all my life... You can't cram 30 years of knowledge into your head in a week... So, I'll do a little debate preparation, but I always prepare in roughly the same way."