I wanted to add that in one brief media moment after the poison gas murders of innocents, Secretary of State Tillerson was caught voicing an opinion that implied a regime change was in order with Assad - which strongly suggests that Trump wants to go further in Syria.

One doubts this is true.

Tillerson was undoubtedly speaking for himself, out of turn, he won't repeat it. Even as a murderer, Assad is clearly the lesser of the two evils between Assad and ISIS. Taking out Assad would give extremist Islam of the Wahhabi variety free rein in Syria. Both Saudi Arabia and ISIS would relish the demise of Assad.