The US promised the international community to remove Assad using terrorists, since the U.S understand that Assad would win a democratic election, if held in Syria.
No evidence given. In 2014 the US created the Global Coalition to counter ISIL http://bit.ly/1ziAxlq. Concerning the presidential election in 2014 in Syria, the EEAS issued a statement concerning the lack of legitimacy; "Elections organised by the regime outside this framework, conducted in the midst of conflict, only in regime controlled areas and with millions of Syrians displaced from their homes would ignore the basic principles of democracy, be devoid of credibility, and undermine all efforts to reach a political solution." http://bit.ly/2phhvhB