US Vice-President Kamala Harris said on Monday she would take a cognitive test in response to jabs from Donald Trump, and challenged the ex-president to take one too as mental fitness becomes a battle line in the White House race.
Democratic candidate Harris has repeatedly said her 78-year-old Republican opponent, now the oldest presidential candidate in US history, is increasingly “unhinged” and unfit to lead the country again.
Trump has, meanwhile, called the 60-year-old vice-president stupid, attacking her IQ in his pitch to voters in a race that the polls suggest is effectively tied.
Harris was asked in a CBS interview segment released on Monday if she would take a cognitive test, as Trump had called for on social media.
“Sure. I would challenge him to take the same one,” Harris said.
“This is what he has resorted to. I think he is actually increasingly unstable and unhinged and has resorted to name calling because he actually has no plan for the American people,” she added.