The famed anthropologist compared Trump to chimps in dominance rituals.
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"The possibility of that is too horrifying to broach," David said.
"What do you have to lose?" the NBA owner asked Trump.
"Can I mess your hair up?" Fallon asked Trump.
"Keep the focus where it belongs—advocating change," she tweeted.
The actor will discuss the 2016 election and corruption in South Sudan.
"I would love to ease up on Donald Trump, but he makes it impossible," Jimmy Kimmel says.
The White House is also honoring celebrity chef José Andrés, author Ron Chernow and others.
"Each one of them has declined," he said.