The Obamas turned up to address party faithful at the Democratic National Convention.
The former President and First Lady together endorsed Kamala Harris at the event, ahead of Harris formally accepting the presidential nomination.
US correspondent Logan Church says Michelle Obama came out with some fiery language in her speech.
"She's always been somewhat of a reluctant campaigner over the years, but she spoke for almost 20 minutes - and spent most of it focusing on Trump, dealing out some absolute zingers."
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