Citing a 2001 article written by Kovaleski that referred to people allegedly seen celebrating the attacks, Trump said it was “Written by a nice reporter.”

Trump went on, “Now the poor guy — you ought to see the guy: ‘Uhh I don’t know what I said. I don’t remember.’ He’s going, ‘I don’t remember. Maybe that’s what I said.’” As he spoke, Trump launched into an impression which involved gyrating his arms wildly and imitating the unusual angle at which Kovaleski’s hand sometimes rests…

Kovaleski suffers from arthrogryposis, a congenital condition that limits the movement of the joints and weakens the muscles around them. As a reporter at the New York Daily News in the late 1980s and early ’90s, he covered Trump’s business exploits and met with the developer on several occasions.