The Governor of Guam, Felix Camacho, has renewed a call for the territory and the Commmonwealth of the Northern Marianas to reunify.
The suggestion, first made an at economic development conference last year, comes after Japan raised the prospect of the entire Okinawa military base of Futenma being moved to Guam.
Guam is set to take 8000 troops and their families by 2014, but Mr Camacho has raised doubts that the island will be ready in time.
Meanwhile last week a Japanese parliamentary delegation visited amid suggestions in Tokyo that all the remaining troops be moved to Guam.
Guam's government says this is not possible, but the CNMI Governor, Benigno Fitial, has offered to take them.
The Northern Marianas is already part of the military buildup plan with land in Tinian ear marked for training.
Mr Camacho says unification would only strengthen the two territories and its communities.