Those two were supposed to be backstops against any externally induced regime change. Now any country at odds with United States currently owning nukes is looking at escalating straight to warning shot doctrine. Having enriched uraniums or some land based ICBM is no longer enough. Something tactical and small enough to be used to limit nuclear fallout but make regional allies absolutely against engaging in war at behest of the US seems like it would test US nuclear umbrella.
ex) Any NATO countries willing to have a low yield tactical nuke detonate near their border but inside a disputed territory/land? Which non-nuclear EU country is willing to erase themselves off the map to shield their European brothers?