WATCH: Harris says Vance's RNC speech didn't tell 'the full story,' left out Project 2025

Vice President Kamala Harris told supporters Thursday that Ohio Sen. JD Vance left out some “telling” details in his address at the Republican National Convention in Milwaukee.

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The GOP vice presidential nominee’s speech told “a compelling story — and it was not the full story,” Harris said at a campaign event in Fayetteville, North Carolina. “Frankly, what’s very compelling is what he didn’t talk about on that stage. He did not talk about Project 2025 , their 900-page blueprint for a second Trump term. He did not talk about it because their plans are extreme, and they are divisive.”

Harris went through a list of ways she sees former President Donald Trump’s platform as contrary to recent claims that the Republican Party is seeking national unity in the wake of an assassination attempt against Trump.

“If you claim to stand for unity, you need to do more than just use the word,” she said.

Harris was campaigning as President Joe Biden isolated in Delaware with a case of COVID-19 . The Associated Press reported that high-profile Democrats like Nancy Pelosi and Barack Obama have encouraged Biden to consider stepping down from the race so that his reelection bid does not affect down-ballot candidates.

Thursday is the final night of the Republican National Convention , where former President Donald Trump will give a speech accepting his party’s presidential nomination. On Wednesday, Harris addressed the assassination attempt against Trump over the weekend, calling it “a heinous, horrible and cowardly act,” and said she and her husband prayed for Trump’s well-being.