The German government said on Saturday that it would launch an investigation into Nazi influence on the country’s post-war central government. The probe at a cost of €4 million ($4.2 million) will run until 2020, and will complement some 20 such inquiries already made at numerous ministries and institutions to determine the reach of alleged Nazi networks following World War II. €1 million will be specially devoted to uncovering Nazi influence at the heart of German power — the Chancellery. Investigators will seek to clarify what continuity there was in the staff of the Chancellery, the office that serves Germany’s...