From the February 29 edition of ABC's World News Tonight with David Muir:
TOM LLAMAS: Today's confrontations coming as the Republican front-runner finds himself in the middle of a new controversy, dodging a question about whether he will reject the support of former Ku Klux Klan Grand Wizard David Duke.
[...]
LLAMAS: Today, Trump under fire, saying he “didn't understand the question.”
[...]
LLAMAS: But Trump clearly knows who David Duke is. Listen to what he said in 2000.
DONALD TRUMP: David Duke just joined, a bigot, a racist, a problem. I mean, this is not exactly the people you want in your party.
LLAMAS: And Friday, Trump said this.
TRUMP: I didn't even know he endorsed me? David Duke endorsed me? Okay, alright, I disavow, okay?