Enlargement of NATO
As of 2018, NATO officially recognizes four aspiring members: Bosnia and Herzegovina, Georgia, Macedonia and Ukraine. The Federation of Bosnia and Herzegovina within Bosnia and Herzegovina has expressed willingness to join NATO, however, it faces consistent political pressure from Republika Srpska, the other political entity in the country, alongside its partners in Moscow. Macedonia has been prevented from joining the alliance by Greece, one effect of the Macedonian naming dispute. Future expansion is currently a topic of debate in several countries outside the alliance, and countries like Sweden, Finland, and Serbia have open political debate on the topic of membership, while in countries like Ukraine, support and opposition to membership is tied to ethnic and nationalist ideologies. The incorporation of countries formerly part of the Eastern Bloc and the Soviet Union has been a cause of increased tension between NATO countries and Russia.
Jens Stoltenberg
On 28 March 2014 NATO's North Atlantic Council appointed Stoltenberg as designated successor of Anders Fogh Rasmussen as the 13th Secretary General of NATO and Chairman of the council, effective from 1 October 2014. The appointment had been widely expected in the media for some time, and commentators pointed out that the alliance's policies toward Russia will be the most important issue faced by Stoltenberg. Angela Merkel, the Chancellor of Germany, took the initiative to appoint Stoltenberg as Secretary-General, securing the support first of the United States, then of the United Kingdom, and then of all other member states. Norway was a founding member of NATO in 1949, and Stoltenberg is the first Norwegian to serve as Secretary-General, although former Conservative Party Prime Minister Kåre Willoch was considered a strong candidate in 1988.