Throughout her 2024 campaign, Harris, 60, has escalated attacks on Trump’s age and mental fitness for office. Earlier this month, she began openly referring to the former president as a “fascist” and calls him increasingly “unhinged.”

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“Don’t take it from me, listen to the people who know him best,” Harris said during an interview Sunday with CBS News’s Norah O’Donnell in which she responded “sure” when asked about taking a test. “His former chiefs of staff. Most recently, four-star Marine Gen. John Kelly. Listen to two former secretaries of defense who worked for him, listen to his national security adviser, listen to his vice president, who have all, in one way or another, said he is unfit to be president again, should never be president again, and is dangerous.”

Trump, 78, himself has frequently claimed that Harris has a low IQ, accusations that the vice president laughed off in her interview with CBS when asked directly.

“This is what he has resorted to, and I think he actually is increasingly unstable and unhinged and has resorted to name-calling because he actually has no plan for the American people,” she responded.

With just over one week until Election Day on Nov. 5, most polls show Harris holding a slight advantage over Trump nationally, but the pair remain tied in the seven battleground states that will likely decide the election.

“It’s a presidential race, and it should be close,” Harris told CBS. “In all honesty, I’m seeing a lot of enthusiasm around our campaign.”

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The vice president will deliver a campaign speech Tuesday on the Ellipse in Washington, the same venue where Trump delivered his Jan. 6, 2021, speech that preceded the Capitol riot.

Harris will also campaign in Arizona, Michigan, Nevada, North Carolina, and Pennsylvania this week, according to campaign officials.