Let's get the facts straight, eh? Tactical nukes are simply nukes designed for battlefield use... they are not syonymous with "neutron bombs" (Enhanced Radiation Weapons). The US no longer has neutron bombs, unfortunately, because their *best* use is in ballistic missile defense, and it is politically incorrect these days to use a nuke to protect yourself against a nuclear attack (go figure).
We had tactical neutron bombs for ABM systems and as armored attack breakers, and we *have* tactical nuclear weapons, and I would hope that indeed we do have some in theater (probably on board ships). Heck, when I was in the Navy we carried tactical nukes - 20 kt depth charges - on the P-3 I used to fly on. Big bang - 20 kt. Also, all of the fleet air defense systems had nuclear warheads available - nothing like a bunch of air burst nukes to stop a soviet bomber attack on a carrier battle group.
Of course the interesting question these days is: which theater? We probably need them a lot more, and may need a lot of them, in the KTOA (Korean Theater) in the near future.
For more info on nuclear weapons, check my page
http://www.tinyvital.com/Misc/nukes.htm . It has some good summary info, and a link to a much larger archive of nuke info.