true.
But that doesn't mean the WH can't simply say that the material wasn't there when US forces secured the facility. There is plenty of evidence for that. We don't need this Russian angle, we can do a better job refuting this attack by simplying saying the stuff was gone when we arrived.
I agree with you, but the WH isn't saying that. They're not saying anything except "we don't know".
I keep hoping for something stronger.