The United States' occupation of Nicaragua and Haiti continued under Coolidge's administration, though Coolidge withdrew American troops from the Dominican Republic in 1924. The U.S. established a domestic constabulary in the Dominican Republic to promote internal order without the need for U.S. intervention, but the constabulary's leader, Rafael Trujillo, eventually seized power. Coolidge led the U.S. delegation to the Sixth International Conference of American States, January 15–17, 1928, in Havana, Cuba. This was the only international trip Coolidge made during his presidency. There, he extended an olive branch to Latin American leaders embittered over America's interventionist policies in Central America and the Caribbean. For 88 years he was the only sitting president to have visited Cuba, until Barack Obama did so in 2016.