The State Department announced on Tuesday that Victoria Nuland, the third highest-ranking U.S. diplomat, would step down. Her career in U.S. diplomacy is a case study in Beltway bureaucrats failing upward over their decades in Washington.Nuland’s “tenure caps three and a half decades of remarkable public service under six Presidents and ten Secretaries of State,” the department said in a press release. “These experiences have armed Toria with an encyclopedic knowledge of a wide range of issues and regions, and an unmatched capacity to wield the full toolkit of American diplomacy to advance our interests and values.”But Nuland’s tenure also...