The problem is, had your position won the domestic political battle after troops were engaged, then the US loses the war. Soldiers who died, did so in vain. Not because of a victorious enemy, but because of politics.
Once the balloon goes up, I think it's treason to act politically against the war.
Before the balloon goes up, fine. But not after.
That wouldn't fly if Clinton were the CinC, and it won't fly now. Otherwise, the President could deploy troops anywhere, anytime and it would be our patriotic duty to support it.
The real mistake is to continue to let our men and women die for no good reason.