Iran's Ayatollah Ali Khamenei.
Ever since Ayatollah Khomeini died in 1989 who had ruled Iran with an iron fist ever since Iran's revolution that brought the Shia regime to power in 1979 Khomeini's successor Ayatollah Khamenei has been Iran's top man even having authority over the President of Iran. In Persian the title of Supreme Leader is Wali Faqh and so this Supreme Leader Ali Khamenei has ruled Iran and will probably do so until his death or maybe ill health forces him to step down however at the present moment Khamenei seems in rude health.
It seems Iran is blissfully happy about the nuclear deal although 98 % of its nuclear industry has been scaled back and shipped to Russia the lifting of sanctions will allow Iran to interact with the world again in the selling of its oil for example which will obviously bring dividends for the Iranian economy.
However old Khamenei has been a bit of a party pooper in his latest statements on Iranian state media saying he is somewhat troubled that the other party to the nuclear agreement i e the West mainly may not keep to its side of the bargain even though sanctions have been lifted thanks to a UN report saying Iran has kept its end of the bargain in dismantling much of its nuclear industry.
He said statements made by some American politicians troubled him and it would seem that he is justified in some of his worries with some of the statements made by the Republican candidates in the run up to the American Presidency.
Robert Gates was talking on Yahoo News saying that probably some of the Republican candidates who are expressing doubts about Obama's foreign policy towards Iran or China and Russia may have a point in the fact that Obama's tenure in the White House and how he has dealt with problems abroad may have diminished America's standing in the world but he went on that the Republican candidates weren't offering any real alternatives either.
The Ayatollah's worries may also have been justified in the fact that more sanctions have been applied to Iran since it recently test fired ballistic missiles and Obama says he wants the US presence in the Middle East to be a bulwark against Iran's meddling influence in the Middle East.
Asked if the Iranians can be trusted Robert Gates plugging his new book on Yahoo News said sternly "No" and explained that the Iranians only went along with this nuclear deal as the UN if it could see Iran was keeping its end of the nuclear bargain it would lift sanctions which it has done and allow Iran to be player on the world market again. Apparently according to Gates Iran will now gain $50 billion Dollars which it will invest in its proxies through out the Middle East namely Hamas and Hezbollah.
Looking at things objectively for a moment and taking no ones side it seems the Middle East has become something of play thing for world powers whether that be Russia, Iran, the US, UK, Saudi Arabia, Israel whoever. Each nation or group of nations pursuing their own goals to ensure their side in Syria's civil war for example gains more power and prestige before perhaps peace talks begin so each side can negotiate from a stronger position but obviously the Islamic State or Al - Qaeda and the Nusra Front will not be there but you could put forward arguments that they should be there but thats another story.
As for Iran and the West it seems right now in attacking Islamic State they are by default on the same side but a cat and mouse game still goes on between the West and Iran.