With just two days to go before the North Atlantic Treaty Organisation’s summit in Bucharest, a decision is pending on whether one, two or three west Balkan countries will be invited to join the alliance.

Croatia, Macedonia and Albania are all seeking invitations at the three-day summit that begins on Wednesday. But an arcane dispute over Macedonia’s name could lead to a veto from Greece. That could torpedo Albania, over which there remain doubts about whether it is truly ready for entry.