In a dramatic incident captured on video, U.S. Department of Homeland Security police Wednesday handcuffed one of Rep. Jerry Nadler aides in the congressmember's Manhattan office, which is in the same federal office building as an immigration courthouse. In the video, which was shared with Gothamist and filmed by a person who was monitoring activity in immigration court, DHS officers entered Nadler’s district office and accused staff members of “harboring rioters.” A Nadler staffer is seen crying and being handcuffed. Another officer is at a door trying to enter a private area of the office while a staffer asks for...