In March 2017, Sen. Rand Paul (R-Ky.) successfully delayed for 11 days Senate ratification of Montenegro's entry into the North Atlantic Treaty Organization (NATO). America's leading advocate for NATO expansion, Sen. John McCain (R-Ariz.) responded by accusing Paul of "achieving the objectives of Vladimir Putin...of trying to dismember this small country." "I repeat again," McCain said then, remarkably. "The senator from Kentucky is now working for Vladimir Putin." Perhaps even more remarkably, though not very surprisingly, McCain is unapologetic about that accusation in his valedictory new memoir, The Restless Wave: Good Times, Just Causes, Great Fights, and Other Appreciations. "Senator...