TEL AVIV — White House National Security Adviser H.R. McMaster served at a UK-based think tank financed by a controversial, George Soros-funded group identified by the Obama White House as central in helping to sell the Iran nuclear deal to the public and news media. From September 2006 to February 2017, McMaster is listed as a member of International Institute for Strategic Studies (IISS), where he served as consulting senior fellow. The IISS describes itself as a “world-leading authority on global security, political risk and military conflict.” The IISS has been supportive of the Obama administration-brokered 2015 nuclear accord with...