Nine United States presidents and one president-elect have made presidential visits to the Caribbean since 1928. Franklin D. Roosevelt made the most trips to the Caribbean islands (14), either for vacation or while involved with Allied diplomatic interactions during World War II. Of the 13 sovereign countries in the region, four—Dominica, the Dominican Republic, Saint Kitts and Nevis, and Saint Vincent and the Grenadines—have not as of yet been visited by an American president.