From "The Haitian Political Situation and Its Effect on the Dominican Republic: 1849-1877," William J. Nelson, The Americas, vol. 45, no. 2, (1988), page 227:
The Dominican Republic, which has once again exhibited the fragility of its political institutions by taking over two weeks to ascertain a winner in its last presidential election...This paper also uses the phrase, "one of the worst politicians in all of Latin American history". No, it's no one you're likely to know. Incidentally, if you were writing a short summary of Trujillo's reign, would you put Trujillo's Rwandan-style machete massacre of several tens of thousands of Haitian-Dominicans in 1937 at the forefront (worst act of a despicable man), in the middle (chronologically), or as a passing aside twenty pages later (Jared Diamond)?