The Iranian government is denying an Internet rumor that Foreign Minister Mohammad Javad Zarif’s son was the best man at the wedding of Secretary of State John Kerry’s daughter. The denial by the Iranian-controlled Fars News Agency comes hot on the heels of allegations over the weekend on the website of former Rep. Allen West (R-Fla.) that purported a "frightening" link between the negotiators of the nuclear deal. According to West’s website, Zarif’s son was the best man at the 2009 wedding of Kerry’s daughter Dr. Vanessa Kerry to Dr. Brian Nahed. Nahed is of Iranian descent but was born...