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More generally, they believe it has the potential to show viewers a more unfiltered, even ill-tempered, Trump who would be audible throughout the entire time Ms Harris is speaking. "Our understanding is that Trump's handlers prefer the muted microphone because they don't think their candidate can act presidential for 90 minutes on his own," a statement from Harris's spokesman said.

"Our understanding is that Trump's handlers prefer the muted microphone because they don't think their candidate can act presidential for 90 minutes on his own," a statement from Harris's spokesman said.