The Listin Diario newspaper-Sigma Dos poll shows voter preferences at 42.6% Hipólito Mejía-PRD; 29% Danilo Medina-PLD; and 20% Joaquín Balaguer-PRSC. The survey was carried out 3-4 May and 1,200 persons were interviewed nationwide. It also showed that 4.3% of voters are still undecided.