...i have thought up many scenarios where Turkey would close the Bosporus; yet in all of them they resulted with a Russian advantage over the West, (and in some cases Russia an ally), always as a result of (caused by) his actions in the Eastern Med. ((and Syria) and with all the rest of his neighbours), having isolated himself in these arenas quite explicitly to "defend" Turkey's Sovereignty.
Here it is, spelled out in this article: another "friend" (Russia) and neighbour who can easily become an adversary over something ''new'' as an issue.
https://www.mei.edu/publications/balanc ... a-and-nato
...now, in my mind, the picture of "Blue Turkey" is complete; it includes, not just supremacy of the Eastern Med. and the Aegean, but the Black Sea as well.
...it is notable i guess, i found it odd at least, that Erdogan made it a point to be very clear, that he completely supports the Ukraine against Russia on the issue of the Crimea, to the Press, when answering questions at the White House last week. And that having purchased Russian military hardware recently, (the reason for him having shot down just such hardware not so recently remaining unclear,) it does not prevent him for his incursions, in his mind to continue to buy from the West such hardware as well. It reminds me of de Gaulle, as the Leader of France, who, at the time, pointed his (French made) nuclear weapons at everyone. While in this case, it was strictly a question of non-alignment, and not Imperialistic in its nature.
Indeed, out goes the Treaty of Lausanne, should he prevail (because "we" remain disunited) not a pretty picture (for those of us not "Turkish") i'm guessing .