The Republican former president wrongly claimed Wednesday at the group's annual convention that Harris, the first Black woman and Asian American to serve as vice president, had in the past promoted only her Indian heritage.
Trump's interview, a source of controversy even before it even took place, was remarkably contentious, primarily because of his reaction to sharp questioning by ABC News' Rachel Scott. The appearance split the group's membership.
Harris said Trump's comments on her race were the "same old show" and stressed the need for Black women to organize for his defeat this November.
Trump did not repeat his claims at a rally later Wednesday in Pennsylvania. He also repeatedly mispronounced Harris' first name. Before he took the stage, Trump's team displayed on a big screen what appeared to be years-old news headlines describing her as the "first Indian-American senator."
Harri and her Democratic allies are increasingly branding Trump and his running mate, U.S. Sen. JD Vance, as "weird." As Vance's rocky rollout continues, Trump is also in the position this week of having to defend someone else's controversial comments.
About 8 in 10 Democrats say they would be somewhat or very satisfied if Harris became the Democratic nominee for president, according to a survey by The Associated Press-NORC Center for Public Affairs Research.