Problems with Turkey, Eastern Europe, and Donald Trump could tear the rickety alliance apart at the seams.
If the number of eager applicants on a waiting list determines the strength of a club, then the North Atlantic Treaty Organization (NATO) is in fine fettle.
At its most recent gathering in July, NATO welcomed its 29th member — Montenegro — which means that the alliance now outnumbers the European Union. Nearby Macedonia has been waiting for 17 years to be let in the door only to have Greece block entrance every time because of a longstanding dispute over Macedonia’s name. Bosnia also wants in but must first overcome its internal divisions. Georgia’s membership, too, has been on hold, for fear of inciting Russia’s wrath, though that hasn’t prevented the country from hosting U.S.-NATO military exercises.