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From women's rights to immigration to science, protests aimed at the Trump administration have become commonplace. But should journalists be allowed to take part? Katie Hawkins-Gaar says their employers' policies may be obsolete: "It’s incumbent on U.S. news organizations to take a fresh look at their codes of ethics and provide clear and updated guidance to their journalists." More from Hawkins-Gaar, and Margaret Sullivan on a Marketplace reporter's dismissal.