For Harris and Trump, facial expressions did much of the talking during presidential debate

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As part of the rules for their debate, Harris and Trump’s microphones were muted while their opponent answered questions from the moderators, and while they were unable to respond verbally in those moments, both nominees reacted with their faces to what they were hearing.

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This combination of photos shows Republican presidential nominee former President Donald Trump, left, and Democratic presidential nominee Vice President Kamala Harris during an ABC News presidential debate at the National Constitution Center, Tuesday, Sept. 10, 2024, in Philadelphia. (AP Photo/Alex Brandon)

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People watch the presidential debate between Republican presidential nominee former President Donald Trump and Democratic presidential nominee Vice President Kamala Harris, Tuesday, Sept. 10, 2024, at the Gipsy Las Vegas in Las Vegas. (AP Photo/John Locher)

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Republican presidential nominee former President Donald Trump, left, and Democratic presidential nominee Vice President Kamala Harris are seen on a screen during a presidential debate as people watch at One Longfellow Square, Tuesday, Sept. 10, 2024, in Portland, Maine. (AP Photo/Robert F. Bukaty)

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A presidential debate between Republican presidential nominee former President Donald Trump, on screen at left, and Democratic presidential nominee Vice President Kamala Harris, right, is seen from the spin room, Tuesday, Sept. 10, 2024, in Philadelphia. (AP Photo/Matt Slocum)

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Republican presidential nominee former President Donald Trump speaks during a presidential debate with Democratic presidential nominee Vice President Kamala Harris at the National Constitution Center in Philadelphia, Tuesday, Sept. 10, 2024. (AP Photo/Alex Brandon)

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Democratic presidential nominee Vice President Kamala Harris speaks during a presidential debate with Republican presidential nominee former President Donald Trump at the National Constitution Center in Philadelphia, Tuesday, Sept. 10, 2024. (AP Photo/Alex Brandon)

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Democratic presidential nominee Vice President Kamala Harris gestures as she speaks during a presidential debate with Republican presidential nominee former President Donald Trump at the National Constitution Center in Philadelphia, Tuesday, Sept. 10, 2024. (AP Photo/Alex Brandon)

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WASHINGTON (AP) — Kamala Harris and Donald Trump said as much with their faces as they did with their words during Tuesday’s debate.

With their microphones muted unless it was their turn to speak, according to the debate rules, body language took on outsized importance for Harris and Trump.

Harris in particular leaned into the nonverbal communication, keenly aware that her every reaction was being broadcast to the world, “speaking” to the audience even while Trump ostensibly had the floor. Networks showed a split screen with both candidates for most of the debate.

At various points she looked amused or befuddled by whatever Trump was saying, as if w ordlessly saying he was lying. A few times she dramatically put her fingers under her chin, eyes wide, head tilted. Other times she laughed.

Trump sometimes scowled, sometimes smiled curtly. His eyes flashed anger or annoyance, perhaps even boredom at times. He rarely looked at Harris while she spoke, instead pointing his face forward toward the cameras or ABC News moderators.

When the candidates did have the floor, Trump and Harris both gesticulated with their hands, mannerisms that are by now familiar to Americans who’ve spent a lot of time watching them.