"The First Amendment prohibits the president from punishing journalists because he doesn’t like their coverage, just as it prohibits him from punishing universities because he doesn’t like the courses they offer, or from punishing law firms because he doesn’t like the clients they represent. With so many courts having ruled against him on exactly this point, you’d think President Trump would have learned this lesson by now. If President Trump means to expel these news organizations from the White House press pool, his action is doubly unconstitutional because the press pool is a 'public forum' under the First Amendment, which means the president can’t exclude journalists from it on the basis of their viewpoints."