“You are thinking of EMP, not the neutron bomb. “
No, I’m referring to retaliation.
In that case, you should be aware that Russia has a battlefield strategy (escalate to deescalate) which includes the use of tactical nukes with the associated gamble that the opponent will not escalate to strategic nukes. That’s why the recent US nuclear posture review recommended that the US increase its stockpile of tactical nukes.