Donald Trump accused a New York Times journalist of “using his disability to grandstand” and denied mocking the reporter’s joint condition during a campaign rally in South Carolina on Tuesday. Trump was widely criticized after he blasted Serge Kovaleski for his comments on an article he wrote after the 9/11 attacks for the Washington Post, which Trump had used to back up controversial claims that thousands of Muslims in New Jersey celebrated the collapse of the World Trade Center in 2001.