By Emma Tucker, CNN (CNN) — Columbia University has announced a series of new policies, including restrictions on demonstrations, new disciplinary procedures and immediately reviewing its Middle East curriculum, making apparent concessions following President Trump’s revocation of $400 million in federal funding over campus protests. The Trump administration demanded several changes, including the university enforcing its disciplinary policies, implement rules for protests, ban masks, announce a plan to hold student groups accountable, empower its law enforcement, review its Middle East studies programs and its admissions. President Donald Trump has been threatening to cut federal money to colleges accused of tolerating...