The law is so broad that it could prevent platforms from removing the most extreme posts, including the video of the shooting and the suspect’s racist manifesto, said Chris Marchese, policy counsel for NetChoice. Such restrictions violate the companies’ free speech rights, Marchese told DealBook: “The First Amendment is clear.” But some constitutional law experts are a little less certain. Genevieve Lakier, a free speech specialist at the University of Chicago law school, told DealBook that what seemed “patently unconstitutional” just two weeks ago isn’t so clear now.