I see this as begging the Question of *Ever* using nukes *except* in retaliation ie NO FIRST STRIKE *ever* from the USA. Remember? That was *supposed* to be the US-Rulez Imposed on Self, and *proclaimed* during the [ongoing as we speak] M.A.D. Manifesto. Yes, this principle was re Strategic- ie the MADDEST of the MAD devices. BUT..Ummm, we've ALWAYS retained the "right" of first use in nukes. Happily!
We will/may first strike with nukes.
We will/may second strike with chemicals.
We will never use biological weapons.
Now, the use of TACTICAL nukes was to offset a SUPERIOR FORCE OF ARMOUR.
Well, that and to (I think this was the phrasing) "to dramatically and effectively change the enemy commander's assessment of the battle".
Now, when are we EVER going to face overwhelming armour forces? Or ANY overwhelming force? Iraq was one of the biggest and we STILL wiped them out without even deploying our entire force.
At this point, tactical nukes are (at best) not necessary. Unless Canada has been secretly producing thousands of tanks.
At worst, they are a target for terrorists or people who would supply terrorists.