You want to bet? US diplomats will be expelled. As someone who has served as a Foreign Service Officer over 28 years, this is the standard response. I have seen it happen on a number of occasions. It is called reciprocity. No doubt the Russians will target our intelligence agencies at our embassy and consulates.
Do you think that Putin has no idea what the Obassturd is trying to do and also just how any retaliatory act will be met with an even harsher one from the brat?
Cooler heads will prevail.