I forget, has SouthCom moved from Panama to Miami in the T2k timeline? Might it be trying to evacuate now, or hold on to the Canal? Is that even worth anything?
Still there in the Twilight timeline, I would think. Transfer of the canal would have occurred after the nuclear exchange, and I don't think the US would be in the same hurry we were IRL to pull troops out of the region with the Soviets and Cubans still going concerns.