Luperon did not depart from the usual custom, but called a constitutional assembly which, in 1880, adopted with amendments the constitution of 1879, and fixed the presidential term at two years. Luperon then held an election and gave the presidency, for the two years beginning September 1, 1880, to one of his supporters, Father Fernando de Meriño, an eloquent priest who had taken an active part in politics since his youth, and who later became archbishop of Santo Domingo. The reverend gentleman suppressed all revolutionary uprisings with uncompromising severity and did not hesitate to execute the conspirators that fell into his hands.
During Meriño's administration General Ulises Heureaux served as minister of the interior and began to wield the power which he was to retain for twenty years. Heureaux was born in Puerto Plata about 1846. Both of his parents were negroes, his father being a Haitian who followed the sea and afterwards became a merchant, and his mother a St. Thomas woman. He received a mercantile education and took part as a subordinate in the War of the Restoration against the Spaniards. On the withdrawal of the Spaniards, in 1865, he became a bandit on the Haitian border and practised horse stealing on a large scale. Later he obtained a position in the Puerto Plata custom-house and took a more and more prominent part in the civil disturbances of his country, until he became well known as a politician and a revolutionist. He distinguished himself by his bravery and was many times wounded. Throughout these civil wars he remained a sturdy follower of General Luperon, the successor of Santana as leader of the "Blue" party and an implacable opponent of General Buenaventura Baez, the chief of the "Reds" and of General Ignacio Maria Gonzalez, the leader of the "Greens." When General Luperon overthrew President Cesareo Guillermo, in 1879, Heureaux was closely associated with the revolutionary movement.
Heureaux was able to strengthen himself to such an extent that when, in 1882, Luperon determined to become president himself he found that his former follower had outgrown him in power. The result was that Heureaux became president and served from September 1, 1882, to September 1, 1884. When his term expired a bitter struggle ensued with Luperon, who still retained considerable influence. Luperon's candidate was Segundo Imbert, while Heureaux supported General Francisco Gregorio Billini, who was ultimately victorious. Luperon went into exile, but later became reconciled with Heureaux and returned to die in Santo Domingo.