There’s not much that can be done about this in the short term. Remarkably, Secretary of State Rex Tillerson does seem to grasp the need for diplomacy, with the construction of a new diplomatic framework for handling tensions with Russia, as BuzzFeed News reports. But there is little sign Trump is even capable of paying attention to such things, and less that Tillerson’s badly understaffed agency will be able to implement it in a systematic fashion.
In any event, it’s worth emphasizing that not only is America pouring money and lives down the drain in Syria for virtually no reason, we are also increasing the chance of extremely risky confrontation with Russia — during the presidency of the most inept person ever to hold the office. (The mind reels at the idea of this president attempting to navigate a serious diplomatic crisis.) If Congress had any sense at all, they would be asserting their constitutional duty to oversee the use of military force — remember there has never been any congressional authorization of Syrian intervention — and liberals would be a bit more careful with anti-Russia diatribes.
Even if the Russians did intervene to elect Trump, there will still be no alternative to diplomacy with a nuclear superpower, for now and the foreseeable future.