The Trump administration has said it was “officially putting Iran on notice” in reaction to an Iranian missile test and an attack on a Saudi warship by Iranian-backed Houthi rebels in Yemen but gave no details about how Washington intended to respond.
...any military operation against Iran will likely be very unpopular around the world and require the proper international context—both to ensure the logistical support the operation would require and to minimize the blowback from it. The best way to minimize international opprobrium and maximize support (however, grudging or covert) is to strike only when there is a widespread conviction that the Iranians were given but then rejected a superb offer—one so good that only a regime determined to acquire nuclear weapons and acquire them for the wrong reasons would turn it down. Under those circumstances, the United States (or Israel) could portray its operations as taken in sorrow, not anger, and at least some in the international community would conclude that the Iranians “brought it on themselves” by refusing a very good deal.
Dopey Prince @Alwaleed_Talal wants to control our U.S. politicians with daddy’s money. Can’t do it when I get elected. #Trump2016
If the situation unravels there is the possibility of establishing a declared or undeclared Salafist principality in eastern Syria (Hasaka and Der Zor), and this is exactly what the supporting powers to the opposition want, in order to isolate the Syrian regime, which is considered the strategic depth of the Shia expansion (Iraq and Iran).
The West, Gulf countries, and Turkey support the opposition; while Russia, China, and Iran support the regime.