Federal Judge Naomi Reice Buchwald ruled that President Trump could not block certain Twitter users from viewing his tweets, and that doing so was in violation of the U.S. Constitution. This ruling comes on the heels of President Trump—whose Twitter handle @realDonaldTrump—blocking some of his critics, many of them celebrities, from his Twitter account. Those blocked range from novelist Stephen King to comedian Rosie O’Donnell to Philip Cohen, a professor of sociology at the University of Maryland.