The USA does not maintain diplomatic relations with Cuba but for over 100 yrs we have leased land from Cuba. Also we have an embargo on Cuba. There is no reason for the US to continue a land lease with Cuba since we have virtually no other agreements with them.
Ending this lease should in no way be viewed as supportive of the Cuban government or condoning of their policies.
The USA should take this action unilaterally if necessary, because it is the right and just thing to do.
End the lease with Cuba now!