Republican megadonor Sheldon Adelson has privately told one of his allies that he supports a campaign that depicts H.R. McMaster as anti-Israel and seeks to remove him from his post as national security adviser. In an email to Mort Klein, the president of the Zionist Organization of America, Adelson writes: "Now that I have talked to somebody with personal experience with McMaster, I support your efforts." Why this matters: Adelson is arguably the most influential donor in Republican politics, spending tens of millions of dollars each election season. He also funds the ZOA, which has been relentlessly attacking McMaster and...