What is the state that is not attached to the US?

Pueto rico

ANS2:Whaa? Puerto Rico is not a state (yet).

The question makes no sense. All 50 U.S. states are possessions of the U.S. You might say that KY isn't a state but a commonwealth but, that would be a technicality.

If you take the broad definition of "State", a sovereign country is a state so, Canada is a state but it is not a possession of the U.S.