The deep state needs another war somewhere
Trump needs to fight this with all he has even if he knows he will lose.
The Deep State's spokesmen: the Clinton wing of the Democrats and the McCain/Graham wing of the Republican Party are still enraged that President Trump has decided to discontinue funding and arming the "Free Syria Army," even though the "Free Syria Army" is now basically run by the Al Nusra Front, an Al Quaeda spinoff.
If they can't get their war in Syria they'll find some other route.