WASHINGTON (TNND) — A growing dispute over who belongs at the 9/11 memorial at Ground Zero has spilled into national Democratic politics, as families of victims push back against the presence of New York City’s mayor amid broader tensions over the party’s rising Democratic Socialists of America-aligned candidates.Former press secretary to First Lady Jill Biden Michael LaRosa told The National News Desk he signed the petition asking the mayor not to attend Friday’s ceremony, describing the 9/11 commemoration as uniquely solemn and saying the mayor’s presence would become a distraction. (TNND)On the 25th anniversary of 9/11, families of victims have...