Flour shipped from the Mississippi River to Havana can pass by the very entrance to the city on its way to a port in Spain, there pay a duty fixed upon articles to be reexported, transferred to a Spanish vessel and brought back almost to the point of starting, paying a second duty, and still leave a profit over what would be received by direct shipment. All that is produced in Cuba could be produced in Santo Domingo. Being a part of the United States, commerce between the island and mainland would be free. There would be no export duties on her shipments nor import duties on those coming here.

Eighth State of the Union Address (1876)