Obama has withdrawn the US from international politics and foreign policy with the Obama / Kerry / Rice 'strategic patience' policy which is a fancy diplomatic way of saying; do nothing today, do nothing tomorrow, do nothing for as long as possible. This is no different to the pacifist / isolationist Democratic party stance in the 1930's, which of course ended well for everybody, 1939 for us and 1941 for them.
Fortunately, Churchill's formidable diplomatic skills, the fact he was half American and some good US reporting, got Roosevelt to smell the coffee and to provide considerable help against much fierce opposition from within the Democratic party, with lend lease and convoy protection. This weakness encouraged Japan to try their hand on that 'infamous day' day at Pearl Harbour to keep the US out of the war, which was a terrible strategic miscalculation by the Japanese, but pacifism and appeasement encourages bad actors to overplay their hands.
Now the US with their Navy have retired as the world's police force all of the bad actors who can make financial and political capital out of being assertive are doing so. The Russian / Iranian axis is an obvious one to control the majority of the oil and gas in the Middle East and to be in a much stronger position to dictate global prices. Remember the US since the 1970's have had an embargo on the export of all oil and gas, so any 'shortfall' they can 'generate' with not be supplemented from there.
Russia is not interested in attacking ISIS as many of their senior members have been recruited by the FSB and Russia largely controls the organisation. But they are very useful for two reasons. 1) They can lump all anti-Assad forces as ISIS to attack those, which is what they are doing 2) Russia can play good cop while ISIS plays bad cop.
All Russian attacks and air raids to date have been against non-ISIS, anti-Assad forces which are backed by other regional players. The most important of these is Saudi Arabia. Now Obama / Kerry have told the anti-Assad forces that they are on their own and won't get any defensive weapons, which gives Russia a free hand, expect Saudi Arabia to push back by supplying them. Russia and Iran both loathe and hate Saudi Arabia. Russia as they blame them for the low oil prices and Iran where they are the wrong Islamic tribe and they are stopping their proxies from taking over Yemen. A war between Russia / Iran against Saudi Arabia is not out of the question. Russia has not placed advanced AA defences around their airfield to protect them against ground based anti-Assad forces.
Even if in 2017 there is a more robust FP response by the new POTUS, this will now be at a much greater risk than if the current Obama / Merkel / Hollande / Cameron weak appeasement policies had not happened. Appeasement encourages bad actors to be more assertive and empowers them to take bigger and bigger geopolitical risks. The world is now a considerably more dangerous place as a result of their weak actions.