It's plausible that we are already planning to send ATACMS to really shape the battlefield before a spring or summer offensive, and if we do send it then probably John Q Public wouldn't know ahead of time.
It's also plausible to me that if circumstances change on the battlefield for the negative we could also supply ATACMS to help stave off a big Russian attack, though I think it's very unlikely Russia can reconstitute a force capable of maneuver warfare that would threaten a big breakthrough. Mobilized conscripts and a surplus of ancient artillery ammo can enable slow grinding assaults but nothing that will blitzkrieg Ukraine and catch them off guard IMHO.
It's also plausible to me that if circumstances change on the battlefield for the negative we could also supply ATACMS to help stave off a big Russian attack, though I think it's very unlikely Russia can reconstitute a force capable of maneuver warfare that would threaten a big breakthrough. Mobilized conscripts and a surplus of ancient artillery ammo can enable slow grinding assaults but nothing that will blitzkrieg Ukraine and catch them off guard IMHO.