'NO THIRD DEBATE': Trump claims debate win, rules out rematch

Former US President Donald Trump this morning announced that he would not participate in another presidential debate with Vice President Kamala Harris.

"THERE WILL BE NO THIRD DEBATE!" Trump posted on Truth Social, referencing his first face-off with President Joe Biden in June and his second with Harris on Wednesday.

Harris' campaign had called for another debate after the vice president and Trump faced off at ABC's presidential debate in Philadelphia. Harris reiterated that call during a rally in Charlotte on Thursday, saying, "I believe we owe it to the voters to have another debate because this election and what is at stake could not be more important."

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Donald Trump and Kamala Harris faced off in a US presidential debate this week. (Nine)

Trump posted the message on his own platform, Truth Social. (Supplied)

But Trump has appeared to end speculation about whether another debate would take place, saying that Harris "SHOULD FOCUS ON WHAT SHE SHOULD HAVE DONE DURING THE LAST ALMOST FOUR YEAR PERIOD."

The Harris campaign said it does not take Trump's announcement that there will not be another presidential debate at face value.

"He changes his position every day," said a senior Harris adviser. "I predict there will be another."

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Trump claimed he won the deabte. (Win McNamee/Getty Images via CNN Newsource)

Following their Philadelphia debate, Trump defended his performance to reporters, claiming the ABC moderators were "very unfair" and that it was "three-on-one" during the debate.

The next day on Fox News, Trump said he didn't know if he wanted to participate in another debate as he continued to claim he had "won."

"In the World of Boxing or UFC, when a Fighter gets beaten or knocked out, they get up and scream, 'I DEMAND A REMATCH, I DEMAND A REMATCH!' Well, it's no different with a Debate. She was beaten badly last night. Every Poll has us WINNING," Trump wrote Wednesday on Truth Social.

According to a CNN Fact Check, as of yesterday evening, every major scientific poll about the debate had found that Harris won. That included a CNN/SSRS flash poll of registered voters who watched the debate, who broadly agreed that Harris outperformed Trump.

Former independent presidential candidate Robert F Kennedy Jr, who endorsed Trump after suspending his own bid, said on Fox News that while Trump won the debate on "substance," Harris "clearly won the debate in terms of her delivery, her polish, her organisation and her preparation."

Ohio Senator JD Vance and Minnesota Governor Tim Walz, the respective running mates of Trump and Harris, are scheduled to face off in a debate hosted by CBS on October 1.