The Trump administration is set to pare desk jobs at the top of the intelligence community, invoking the argument that its staffs are too large and duplicative, knowledgeable sources say. One of the first targets is the Office of the Director of National Intelligence (ODNI), where Richard Grenell, the U.S. ambassador to Germany and a favorite of President Trump, arrived as acting director in February. Mr. Grenell has brought in Kash Patel, once a close aide to Rep. Devin Nunes, California Republican. Mr. Patel principally wrote the 2018 Nunes memo that exposed the FBI’s reliance on the discredited Christopher Steele...