The upcoming first TV debate between Vice President Kamala Harris (D) and former President Donald Trump (R) is causing a heated debate over the mute microphone rule. Harris proposed a transparent debate format with the microphone on throughout the debate, while accusing Trump’s team of not trusting him and not allowing live microphone debates. The debate is scheduled to take place on September 10 in Philadelphia, Pennsylvania, and the rule of muting the candidate’s microphone is causing a tense battle between the two sides. Despite the rule being applied in the past, Harris’ team is against it, while Trump has agreed to the debate rules similar to the CNN debate. ABC News did not immediately respond to a request for comment.