Former British spy Christopher Steele and Fusion GPS founder Glenn Simpson claimed to have concerns about the safety and security of one of the sources for the dossier, but outed him anyway by talking to journalists. Steele told a State Department official in October 2016 that “source protection” was a focus in his investigation of President Donald Trump, according to notes from the meeting released earlier this month. That purported concern was also shared by Simpson, who hired Steele on behalf of the Democratic National Committee and the Clinton campaign. He told Justice Department official Bruce Ohr on Jan. 20,...