I have to say I agree with @GDIS Pathe on this one, and always have. Yes, the Drakia are horrific. But preserving the Republic is more important for a President than waging an illegal foreign war against an admittedly evil enemy. Today, it's Klein against Drakia. Tomorrow, it's some LeMay/MacArthur/Ripper type invading God only knows where for whatever reason they feel like. Out of control military commanders are how Rome went from a Republic to an Empire. Even if one wants to argue a moral case, I'd argue that letting one evil empire expand is an acceptable trade off to prevent the rise of a second aggressive, expansionist empire.
I think this is the key point, a country where an regional commander can launch carry out an independent foreign policy and launch unprovoked wars is not a stable country with a good long term trajectory. If the US had gone all in they might have liberated bits of West and North Africa but they weren't going to touch the core of Drakian territory. Then when the US statocracy overreaches and manages to unite the Pan-asians and Europe against it and it will I wonder what will happen to those areas liberated from the Drakians?