At a campaign rally in South Carolina this week, Trump was discussing his much-refuted claim that he had personally witnessed Muslims celebrating after the 9/11 terror attacks. Kovaleski, who has a congenital joint condition, says he has no recollection of anyone claiming that "hundreds of thousands" of people were seen celebrating. According to the Washington Post, Trump appeared to mock Kovaleski's physical condition; the reporter has arthrogryposis, which visibly limits flexibility in his arms.